AITA for taking my son for my custody time and not his half brother?

How far would you go to enforce custody boundaries when an ex keeps shoving her affair child into your parenting time, complete with packed bags and coached lies from your own kid? A devoted dad stood firm after his cheating wife repeatedly tried to force him into fathering her younger son, escalating to court-ordered neutral exchanges that she still ignored.

The manipulation started post-divorce and intensified over years. Heart-tugging scenes at pickups masked deeper coercion, prompting questions of cruelty versus self-preservation in blended family fallout.

‘AITA for taking my son for my custody time and not his half brother?’

The marriage ended amid betrayal with clear paternity results.

I (30M) have an 8 year old son with my ex-wife. During her second pregnancy I was still married to and thought the baby was mine. But then I learned...

I left the marriage and filed for divorce and when ex's son was born I took a DNA test which proved I was not the father to her younger son....

The divorce went through. I pay a small amount of child support to even things out at her house, because I earn more than my ex. Ex was with this...

Once he dropped out of the picture she tried crawling back to me. She said our son was lucky to have me and she'd love a dad for her second...

She looked shocked and I told her she was delusional if she thought I would trust her again or want to raise her son as my own after what she...

She told me it would be better for the boys to be together always and that with a 4 year age gap they will never know the half stuff if...

I firmly said no and told her she needed to focus on finding someone else if she wanted to give her son a father figure.

Persistent pushback led to legal interventions for exchanges.

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Four years on and my ex did not find someone else and she still tries to push her son onto me. I had to bring her back to court to...

she would have her younger son ready and waiting to come with me. It became a problem and she refused to stop. So I thought meeting at some location for...

It worked for a small period of time but then Friday when I was picking my son up for my parenting time, she brought her younger son along and he...

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He walked over with my son and held his arms out like he wanted to be hugged/held and said he was coming too. He looked so happy. I felt bad...

Accusations flew via texts, including claims from the shared son.

Ex started texting me late Friday night and all day yesterday saying I was a d__k and I should have had my heart melt enough to let him come. She...

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Then she told me our son wanted his brother at my house and I was an ass for ignoring that too. I spoke to my son yesterday and he never...

He did say his mom told him to say he wanted his half brother at my house too and that he wanted me to be his half brother's daddy. But...

Ex's words get to me though. Maybe because I know her son doesn't really have anyone outside my ex and my son, and my son is more into friends than...

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The core issue revolves around post-divorce boundary violations where the ex-wife weaponizes her younger child to regain control. The father maintains legal and emotional limits tied to biology and trust. Coaching the shared son adds parental alienation risks.

The father prioritizes his child’s stability over guilt. The ex seeks free fathering without accountability. The younger boy’s confusion stems from false promises. Communication devolves into manipulation when rejection persists.

Family law expert Dr. Joan Kelly highlights in Surviving the Breakup that “Parental alienation through coerced statements harms child adjustment long-term” (1982). Documented incidents warrant custody reviews to protect both boys from ongoing emotional turmoil.

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Log all texts and incidents. Request supervised exchanges. Seek therapy for the shared son. Petition for alienation penalties. These enforce court orders while shielding innocence.

Here’s what people had to say to OP:

The thread erupted in sympathy for the rejected toddler and fury at the mother’s tactics. Users urged legal escalation to halt the damage.

Unanimous support backed the dad’s refusal amid calls for court action. The younger child’s plight drew heartbreak.

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Medical-Cat-821 − NTA. It's pretty clear that the major AH is your ex, who is getting half-brother's hopes up without your consent. She messed up, and I understand she want...

JamilViper_Nrc − Nta but g__damn that poor kid. .. That poor poor kid. I can't imagine what she's telling that lil guy in private. He just wants love and ....

[Reddit User] − NTA. Take her back to court for coaching your son. In some states, a GAL would slam her for coaching.

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Outrage focused on manipulation’s long-term harm. Full custody suggestions surfaced.

Dalton402 − NTA Your ex is still not taking ownership of her cheating nor the consequences. She is trying to force you to be her 2nd son's father. By telling...

You need a talk with you ex about this bc it can't go on or that little boy will have issues later in life. You need to tell her that...

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Repulsive_State_7399 − NTA. I think you need to get courts involved as she is damaging both kids with this behaviour.

Final_Figure_7150 − It worked for a small period of time but then Friday when I was picking my son up for my parenting time, she brought her younger son along...

He walked over with my son and held his arms out like he wanted to be hugged/held and said he was coming too. He looked so happy. This breaks my...

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Your ex is feeding him hope about you being his daddy . .. only for him to be crushed every time. That boy will be traumatized for life. As tragic...

You've been firm with your boundaries from day 1. Your ex is the one who is dragging an innocent child into adult drama he doesn't understand. On top of that,...

If I were you, I'd be going back to court and getting this documented, for both of the boys' sake. She is going to do so much damage to both...

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Practical fixes like third-party exchanges rounded out advice. Abuse labels stuck.

BoredofB − NTA! I hope you sue her for full custody, this way you don't have to interact with her other son. Your ex is a flaming A**hole for literally...

Tinkerpro − That poor baby boy. He is going to grow up hating his mom, probably hating you and life in general. And he would be find if she stopped...

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My two grandsons have two different dads. When older boys dad comes to pick him up, his little brother greets him wit. “Hi, Charlie’s dad! ” He is three and...

Deathlykitten78 − NTA it is real alarming that she tries again to push that child to become yours again! In my opinion (I am a woman) she needs to stop...

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And please go to a lawyer to tell that she already whispering in your kids ear that your child has to say that he wants to have his younger half...

Then something else, the reason she is doing it because she is seeing now that her actions have consequences and that she has lost it al. So did her youngest...

Don’t feel sorry for the child because this is something that his own dad is doing! He has to learn to cope with that! Your not his real dad! And...

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But if you are going to act like his dad this boy is going in the end having a lot of problems with it because he was lied to him...

Because in her mind when you are going to love that kid, she could have you back! She don’t want to be accountable for her own actions. She does everything...

The manipulation of her kids and you!And that is a real red flag So be careful when you have another woman in your life because I think your ex might...

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Worldly_Act5867 − She is abusive and manipulative

DoIwantToKnow6417 − *He walked over with my son and held his arms out like he wanted to be hugged/held and said he was coming too. He looked so happy. *...

* Ex started texting me late Friday night and all day yesterday saying I was a d__k and I should have had my heart melt enough to let him come.

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I spoke to my son yesterday and he never asked for that or said he wanted it. He did say his mom told him to say he wanted his half...

Your ex is f*ing up her youngest son by manipulating him into manipulating you to come back. AND she's trying to co-erce and manipulate your son. She's an incredibly f'ed...

Can you do the exchanges via a third person so you don't have to see your ex and she won't have a chance to push her youngest on you?

Dogmother123 − Your ex is doing untold damage to her younger child but this is on her. The younger child is not yours and you should not be coerced into...

Does she have family to reach out to who will talk to her about this behaviour?* Or alternatively is there a child centre where drop off can be arranged? I...

[Reddit User] − Why don’t you go for full custody?

Ballamookieofficial − NTA she's looking for free childcare with the other kid.

clearheaded01 − NTA Ex is a selfish d__k. .. She said I have proven to be an amazing dad to our son Good! ! and she just wants the same...

that she should've thought about that before she cheated on you and decided for f__k some lowlife loser. .. Her youngest is not your responsibility - its her own fault...

Upholding custody terms protects everyone when exes blur lines with affair offspring. The father’s consistency models healthy limits despite emotional tugs. It warns that unchecked coercion scars innocents far beyond biology.

Would you pursue full custody over coached lies? How soon should courts intervene in sibling push tactics?

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