Major spoilers ahead: This guide covers I Only Need the Duke’s Child spoilers and To the Perfect Duke spoilers, including Blair’s regression, Herdin’s secrets, Asiel’s fate, the reported novel ending, Edith’s revenge plan, and what is currently known about her relationship with the Duke of Myers.
If you only want the biggest I Only Need the Duke’s Child spoiler, Blair does eventually get another chance to be with Asiel. Her second marriage to Herdin also exposes truths she never understood in her first life. Completed-novel readers report that Herdin eventually remembers the previous timeline, Blair does not forgive him immediately, and the story ultimately gives Blair, Herdin and Asiel a happier outcome.
To the Perfect Duke follows a different heroine and conflict. Edith wants revenge against the Reynolds family after what happened to her mother, and her relationship with the Duke of Myers becomes a way to gain the power she previously lacked.
Some late I Only Need the Duke’s Child details below come from readers of the completed novel rather than currently available English adaptation chapters. Those spoilers are labelled accordingly instead of being presented as officially confirmed English-release facts.
I Only Need the Duke’s Child Spoilers: What Happens?
The central twist in I Only Need the Duke’s Child is that Blair does not return to the past to fix her romance.
She returns because she wants her son.
In her first life, Blair is married to Herdin Delmark. Their marriage is deeply unhappy, and Blair believes Herdin does not truly love her.
The brightest part of that life is their son, Asiel.
Then Blair loses everything.
After being attacked, she wakes up years in the past, before Asiel has even been born.
That creates a brutal choice.
Blair could avoid Herdin and potentially escape the marriage that caused her so much pain. But doing that would mean accepting a future in which Asiel may never exist.
She cannot do it.
So Blair decides to marry Herdin again.
The English listing for I Only Need the Duke’s Child on WebNovel confirms the core regression premise: after dying tragically, Blair returns to the past and chooses to become involved with her former husband again because she wants to meet her child.
Why Does Blair Marry Herdin Again?
Blair remarries Herdin because she wants Asiel himself, not simply another chance at motherhood.
Her plan is deliberately practical.
She proposes a marriage lasting one year, while also agreeing to cooperate with Herdin over the mystery surrounding an incident from ten years earlier.
Blair believes she can recreate the circumstances that led to Asiel’s birth and then leave Herdin before her second life becomes another version of her first.
That is why her regression is different from a typical second-chance romance.
Blair is not thinking:
This time I will make my husband love me.
Her thinking is closer to:
I will endure this marriage again if that is what it takes to have my son back.
That distinction drives almost every important decision she makes.
Why Does Herdin Act Differently After Blair’s Regression?
Blair expects Herdin to behave like the cold husband she remembers.
He does not.
In the second timeline, Herdin becomes much more interested in Blair and increasingly unwilling to maintain the emotional distance she wants between them.
This immediately disrupts her plan.
Blair believes she already knows how their relationship will develop because she lived through it once. Herdin’s changed behaviour proves that the future is no longer following the exact path she remembers.
The official English synopsis itself draws attention to this contradiction: Blair expects a largely contractual marriage, but Herdin behaves far more intimately than she anticipated.
That raises the story’s bigger question:
Was Blair wrong about Herdin in her first life, or has the new timeline changed him?
Readers who enjoy similarly complicated noble marriages can also read our The Ugly Wife of the Shady Duke spoilers, which explores another duke-centred romance shaped by reputation, political pressure and misunderstanding.
Did Herdin Really Cheat on Blair?
This is one of the biggest I Only Need the Duke’s Child spoilers readers look for.
Completed-novel reader reports indicate that Herdin’s apparent relationship with another woman was not a straightforward affair.
Blair remembers believing that another woman would eventually become Herdin’s lover. That memory is one reason she refuses to emotionally invest in him again.
She already knows how painful loving him can become.
Later novel-reader discussions, however, describe Herdin’s apparent betrayal as an attempt to make Blair distance herself from him rather than evidence of a genuine romantic relationship.
The distinction changes the meaning of his actions, but it does not erase their consequences.
From Blair’s perspective, she still spent her first life believing her husband rejected her.
Herdin withheld information and made decisions about Blair’s future without allowing her to understand what was actually happening.
So the most accurate spoiler is:
Herdin apparently did not betray Blair in the simple way she believed, but his attempt to push her away still caused serious emotional damage.
What Is Herdin’s Curse?
Later novel-reader spoilers connect Herdin’s behaviour to a curse or destructive danger affecting people close to him.
This is important because it reportedly explains why Herdin believed creating distance between himself and Blair was necessary.
If Blair remained close to him, he believed she and their child could be endangered.
His cold behaviour therefore takes on a different meaning.
What Blair experienced as rejection was, from Herdin’s perspective, connected to an attempt to protect her.
However, this information currently relies heavily on completed-novel reader reports rather than the early English adaptation.
It also does not automatically redeem Herdin.
Protecting Blair without giving her the truth still means taking away her ability to make an informed choice about her own life.
That conflict becomes important when Blair eventually learns more about what happened.
Who Killed Blair in Her First Life?
Blair’s death is connected to a larger mystery rather than being a random attack.
Her first life contains unresolved events involving Herdin’s family, Blair’s own missing memories and an older imperial tragedy.
Novel-reader spoiler discussions connect the conspiracy to powerful figures behind those earlier events and identify a larger antagonist involved in the tragedy.
Because the full chain of events is not yet easily verifiable through the currently available English adaptation, the exact late-novel conspiracy should be treated as reader-reported spoiler information.
What the story establishes much earlier is that Blair’s murder cannot be understood separately from the past.
The incident from ten years earlier matters.
Her missing memories matter.
Herdin’s family history matters.
And eventually those mysteries begin connecting to the tragedy Blair remembers from her first timeline.
For another story where buried information changes how earlier events are understood, see our The Black Diary spoilers and ending explanation.
Does Herdin Remember His Previous Life?
Yes, according to completed-novel reader spoilers, Herdin eventually recovers memories connected to the previous timeline.
This is one of the most important reported twists in the romance.
Until that point, Blair carries an emotional history Herdin cannot fully share.
She remembers:
- their first marriage;
- loving him;
- believing he rejected her;
- raising Asiel;
- losing her child;
- and dying.
Herdin does not initially carry that same burden.
Once his previous-life memories return, he can finally understand what Blair has been carrying since her regression.
He also reportedly realises something painful: despite everything she experienced with him, Blair willingly married him again.
Not because she wanted another chance at his love.
Because she wanted Asiel back.
Does Blair Forgive Herdin?
Not immediately.
This is important because the story does not simply reveal Herdin’s reasons and have Blair instantly forget her suffering.
According to readers of the completed novel, Blair leaves.
Herdin later pursues her, but their eventual reconciliation occurs after separation rather than through an immediate forgiveness scene.
That gives Blair more agency than she had during much of her first marriage.
She no longer defines her happiness around whether Herdin loves her.
Her original reason for returning remains Asiel.
Does Blair Run Away From Herdin?
Yes, according to completed-novel spoiler reports.
Blair leaving Herdin becomes part of the emotional fallout once the relationship’s deeper truths emerge.
This matters because learning Herdin’s motives and forgiving Herdin are two different things.
Blair can understand why he made certain decisions without agreeing that those decisions were acceptable.
Herdin therefore has to confront the consequences of what happened rather than receiving immediate forgiveness simply because his intentions were more complicated than Blair realised.
Is Asiel Born Again?
Yes. Completed-novel spoilers report that Asiel returns to Blair’s life.
This is arguably the most important spoiler in the entire story.
Everything Blair does after regression revolves around one goal: meeting her son again.
She is willing to return to Herdin.
She is willing to risk another painful marriage.
She is willing to build her second life around recreating the circumstances that once gave her Asiel.
Reader reports indicate that Asiel’s return happens very late rather than early in the main story.
That allows the novel to resolve Blair and Herdin’s relationship and the larger mystery before delivering the emotional payoff promised by Blair’s original goal.
Did Asiel Also Go Back in Time?
One of the more unusual completed-novel spoilers suggests that Asiel himself became involved in the time-reversal phenomenon.
According to reader discussions, his connection to the regression was not simply Blair giving birth to an unrelated version of the same child.
This remains a late-novel spoiler that is harder to verify through currently available official English material, so it should be treated as a reader-reported detail.
If the reports are accurate, however, they reinforce something the story has emphasised from the beginning:
Blair does not want a replacement child.
She wants Asiel.
Who Is Mikhail?
Mikhail initially appears as another important man around Blair, but his role becomes more complicated than a standard second male lead.
His background is deliberately mysterious.
Later novel-reader reports connect him more directly to the family conflict surrounding Herdin, suggesting that his importance extends beyond creating romantic jealousy.
Until those late portions become more readily verifiable through official English material, the exact family details are best treated cautiously.
The important point is that Mikhail becomes connected to the wider plot rather than existing solely as Herdin’s romantic rival.
Do Blair and Herdin End Up Together?
Yes. Completed-novel reader reports indicate that Blair and Herdin ultimately end up together.
But their happy ending is not simply:
Herdin had a good reason, Blair forgave him, the end.
The reported path toward reconciliation includes several major developments:
- Blair discovering more about Herdin’s behaviour;
- the truth surrounding the danger or curse;
- Herdin recovering memories of the previous timeline;
- Blair refusing to forgive him immediately;
- Blair leaving;
- Herdin pursuing her;
- the larger conspiracy being exposed;
- and Asiel returning to their lives.
By the time they reconcile, their relationship is no longer identical to the marriage Blair remembers from her first life.
I Only Need the Duke’s Child Ending Explained Quickly
| Spoiler question | Answer |
|---|---|
| Does Blair regress? | Yes |
| Why does Blair marry Herdin again? | She wants Asiel back |
| Does she return for Herdin’s love? | No |
| Does Herdin act differently? | Yes |
| Did Herdin simply cheat on Blair? | Reader spoilers say the situation was more complicated |
| Is Herdin cursed? | Completed-novel readers report a curse/danger |
| Does Herdin remember the old timeline? | Reader spoilers say yes |
| Does Blair immediately forgive him? | No |
| Does Blair leave Herdin? | Reader spoilers say yes |
| Does Asiel return? | Yes, according to completed-novel spoilers |
| Do Blair and Herdin end up together? | Yes, according to completed-novel reports |
| Happy ending? | Reader reports indicate yes |
Why Is Herdin’s Ending Controversial?
Knowing Herdin’s motives does not necessarily make every reader forgive him.
That is why reactions to his character are divided.
One interpretation is that Herdin genuinely loved Blair and made terrible choices because he believed keeping her away from him would save her.
Another interpretation is that his intentions do not justify manipulating Blair, withholding critical information and deciding what was best for her without her consent.
Both interpretations can exist because the revelation explains Herdin’s behaviour without undoing what Blair experienced.
The novel gives him an explanation.
Whether that explanation earns redemption is ultimately something readers decide for themselves.
If complicated relationship power dynamics are what interest you most about these stories, our You Were My Slave spoilers explores another romance where readers may interpret the central relationship very differently.
To the Perfect Duke Spoilers: What Happens?
To the Perfect Duke (완전무결한 공작님께) is a separate story from I Only Need the Duke’s Child.
Here, the female lead is Edith.
Her story begins not with regression and motherhood but with revenge.
Edith’s mother dies because of the Reynolds Marquis family. Edith knows who is responsible, but knowing the truth does not give her enough power to punish them.
Her circumstances also leave her with a damaging reputation.
The To the Perfect Duke listing on Novel Updates describes the story as a Korean fantasy-romance involving revenge, arranged marriage and a female protagonist.
Edith’s solution to her powerless position is the Duke of Myers.
Why Does Edith Want Revenge on the Reynolds Family?
Edith holds Reynolds responsible for what happened to her mother.
But revenge requires more than anger.
She needs status and power.
Her enemies already occupy a position from which they can damage her reputation and limit what she can do against them.
That is why her relationship with the Duke matters.
It changes the balance of power.
Instead of confronting Reynolds as the same vulnerable Edith they already dismissed, she has the opportunity to acquire enough influence to make retaliation possible.
Her romance therefore begins with a political purpose attached to it.
Why Does Edith Marry the Duke of Myers?
Edith sees the Duke of Myers as a way to obtain the leverage she needs.
She does not approach marriage believing that love will solve her problems.
Instead, the relationship has a transactional quality: if both people benefit from the arrangement, Edith is willing to accept it.
That makes To the Perfect Duke more than a straightforward romantic fantasy about marrying an attractive nobleman.
For Edith, marriage can become a weapon.
Her position beside the Duke gives her possibilities that she did not have when confronting Reynolds alone.
This revenge-driven setup is also why her story has thematic similarities to Princess Wei Yang, where loss, political manoeuvring and retaliation strongly shape the heroine’s path.
Does Edith Want to Have the Duke’s Child?
The possibility of having a child appears early enough to reveal how strategically Edith thinks about marriage.
Rather than treating marriage, intimacy and an heir as purely romantic milestones, Edith considers what each development could mean for her position.
Her damaged reputation matters.
Her political security matters.
And the status that could come with the marriage matters.
This tells readers something important about her character.
Edith is planning ahead.
She is entering a relationship while already considering how marriage could change her ability to survive and retaliate.
Is the Duke of Myers Really Perfect?
The Duke carries the reputation of an almost flawless man, which gives the title To the Perfect Duke its obvious meaning.
But “perfect” also creates tension.
Edith herself enters the relationship with motives she cannot reduce to romance. The Duke’s polished public image similarly does not necessarily reveal everything happening underneath.
Their relationship therefore develops around two people whose public positions and private motivations are not necessarily identical.
That creates room for romance, distrust and political calculation to overlap.
Does Edith Get Her Revenge?
Revenge against Reynolds is clearly one of Edith’s central objectives, but a fully verified English account of every final-novel twist is not currently available from the sources used here.
That distinction matters.
It would be easy to fill this section with dramatic claims copied from unverified spoiler posts, but doing so would risk giving readers an invented ending.
What reliable English listings establish is Edith’s revenge motive and the importance of her relationship with the Duke of Myers.
Her objective is not simply to survive Reynolds.
She wants the people responsible for destroying her family to face consequences.
Until the complete ending can be verified through stronger sources, specific claims about exactly how every enemy falls should be treated cautiously.
I Only Need the Duke’s Child vs To the Perfect Duke
Despite appearing together in spoiler searches, the two stories have completely different protagonists and motivations.
| Detail | I Only Need the Duke’s Child | To the Perfect Duke |
|---|---|---|
| Female lead | Blair | Edith |
| Main male character | Herdin Delmark | Duke of Myers |
| Main setup | Regression and second marriage | Revenge and strategic marriage |
| Heroine’s goal | Get Asiel back | Gain power and punish Reynolds |
| Main emotional driver | Motherhood | Revenge |
| Regression | Yes | Not the central premise |
| Marriage motivation | Blair needs the same future that produced Asiel | Edith needs leverage |
| Major mystery/conflict | Previous timeline, Blair’s death and Herdin’s secrets | Edith’s mother and Reynolds |
| Romance dynamic | Second chance with a former husband | Strategic relationship |
| Core themes | Motherhood, regret, memory, second chances | Revenge, status, power, trust |
The key difference is simple:
Blair willingly returns to a painful relationship because she cannot abandon the son she lost. Edith enters a powerful relationship because she refuses to let the people who destroyed her family escape without consequences.
Frequently Asked Questions
What is the biggest I Only Need the Duke’s Child spoiler?
The biggest spoiler is that Blair’s second life eventually gives her another chance to recover Asiel. Completed-novel readers also report that Herdin remembers the previous timeline and that Blair and Herdin eventually reach a happy ending.
Why did Blair regress?
Blair dies in her first life and wakes in the past before Asiel has been born. Her regression gives her the opportunity to change her future, but she chooses to marry Herdin again because she wants her son back.
Why does Blair marry Herdin for a second time?
Blair believes marrying Herdin again is necessary if she wants Asiel to exist. Her primary motivation is motherhood, not repairing her romance.
Did Herdin actually cheat on Blair?
Completed-novel reader discussions indicate that the apparent affair was not a straightforward romantic betrayal. Herdin reportedly created distance from Blair because of the danger surrounding him, although his actions still caused her significant emotional harm.
Does Herdin remember the first timeline?
According to completed-novel reader spoilers, yes. Herdin eventually regains memories connected to their previous life, allowing him to understand what Blair experienced.
Does Blair forgive Herdin?
Eventually they reconcile, according to completed-novel reports, but Blair does not immediately forgive him. Reader spoilers indicate that she leaves and Herdin later pursues her.
Does Asiel come back?
Yes, according to completed-novel spoiler reports. Asiel’s return provides the emotional payoff to Blair’s decision to repeat her marriage with Herdin.
Do Blair and Herdin have a happy ending?
Completed-novel readers report that Blair and Herdin ultimately end up together with Asiel, although Herdin’s path to redemption remains controversial.
What is To the Perfect Duke about?
To the Perfect Duke follows Edith, whose mother dies because of the Reynolds family. Edith seeks revenge and sees her relationship with the Duke of Myers as a way to gain the power and status she needs.
Why does Edith marry the Duke?
Edith approaches the relationship strategically. Marriage to the Duke can give her leverage against Reynolds, making revenge rather than pure romance an important part of her motivation.
Final Thoughts
The combined search for I Only Need the Duke’s Child spoilers and To the Perfect Duke spoilers leads to two very different stories built around powerful marriages.
Blair’s story is driven by motherhood. She already knows what loving Herdin can cost her, yet she willingly returns to him because a life without Herdin could also mean a life without Asiel.
That is what makes I Only Need the Duke’s Child more emotionally complicated than a standard regression romance. Blair is not trying to recover the husband she lost. She is trying to recover the child she cannot replace.
To the Perfect Duke reverses that emotional motivation.
Edith is not looking backwards for someone she lost through regression. She is looking forward toward revenge. Her relationship with the Duke of Myers offers the power and status she needs to challenge the family responsible for her mother’s death.
The two stories therefore reach the “duke romance” setup from opposite directions:
Blair remarries to recover her child. Edith pursues marriage to gain the power to take revenge.
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