AITAH For Not Giving My Son’s Half Siblings Mother Half The Money Their Father Sends Me?

A single mother quietly receives under-the-table cash each month from her child’s elusive father—money that keeps rent paid, groceries stocked, and a small college fund growing. She never mentions it, assuming the mother of his other two kids gets nothing, given the man’s open disdain. Silence preserves peace among co-parents who share only grandparents and frustration.

The fragile balance shatters when the other mom, Kathleen, learns the truth through Michael’s parents. Suddenly, she demands half the cash—then ups it to two-thirds, arguing her two children outweigh the poster’s one. What begins as a private lifeline morphs into a public tug-of-war, forcing the poster to choose between her son’s stability and guilt over another family’s struggle. The knot tightens: give in and risk eviction, hold firm and wear the villain label—all while the real culprit vanishes into the wind.

'AITAH for not giving my son’s half siblings mother half the money their father sends me?'

Family ties tangle across absent partners and shared grandparents.

I had a hard time figuring out how to word it. I’ll try to lay out everything more clearly here. I have a son with a man named Michael. Michael...

Neither of us is currently in a relationship with Michael and don’t exactly know where he is because he moves around a lot. Kathleen and I as well as Michael’s...

Secret cash arrives monthly through a middleman, while assumptions keep mouths shut.

Every month Michael will send me money through his friend. Given Michael’s distain for her and her financial difficulties I assumed that he was not sending her any money. I...

Truth slips out and a demand lands hard.

Apparently she always assumed I had a high paying job and only recently found out from Michael’s parents that was not true and it came to light that Michael was...

So now she wants me to give her half the money that Michael is sending me. She even suggested she was being generous since she should really get 2/3rds since...

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Refusal protects a fragile future built on every dollar.

The thing is giving away half the money would really be a big financial blow to me and my son. It would mean a drastic change in our lifestyle and...

So far I only have a small amount saved, but by the time he’s 18 it should be a good amount to get him started. I do realize this is...

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Ultimately I think we can all agree that Michael is the main a__hole here, but I wonder if I am too. I can live with it if I am being...

Edit. It keeps being brought up so I thought I should add that I do have a child support order. So does Kathleen. Kathleen hasn’t been able to hers enforced...

Child support battles often pit parents against each other when the real culprit hides. Here, Michael dodges formal obligations, funneling cash only to one household while the other scrambles. The poster’s refusal isn’t greed—it’s survival math.

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Counter-arguments frame it as communal fairness: two kids versus one. Yet legal reality slices clean—support targets specific children, not blended equity. What makes the story more complicated, Michael’s selective payments hint at favoritism or doubt over paternity, risks the poster can’t gamble on.

Parallel enforcement failures bind both mothers, but only one receives aid. Family law attorney Lisa Helfend Meyer states, “Voluntary payments outside court orders create no duty to redistribute; each parent must pursue the obligor directly”. Giving in could dry the well entirely. Socially, this mirrors deadbeat-dad fallout where women police each other instead of the source. The poster’s stance safeguards her child without malice.

See what others had to share with OP:

Social media sided firmly with the poster, insisting the fight belongs with Michael alone.

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[Reddit User] − NTA Kathleen needs to settle this with Michael, not you.

NBClaraCharlez − Nta. This has nothing to do with you and is 100% a matter between her and the guy she has two kids with. If she does go to...

However, you are getting money through the guys friend, so that's not exactly reliable. I would not be basing my current lifestyle around such a nebulous source of money that...

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superflex − "sharing" child support between different baby-mama's isn't a thing. her situation is with Michael, and you have nothing to do with it. NTA.

Wonderful-Set6647 − NTA she is not entitled to your son’s money. She needs to go after her baby daddy for child support not you.

Careless-Ability-748 − Nta she and her kids are his responsibility, not yours. You are not obligated to give her anything.

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A couple of replies urged caution without blame, warning of fragile cash flows.

ModeMysterious3207 − As far as you know, he might already be sending her money. NTA. Don't give in to scammers and bullies.

Disastrous_Ad_8561 − Say no. But you also need to consider he isn’t sending it to her for a reason. If you decide to give her the money he sends to...

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Light-hearted jabs kept the mood from boiling over.

tuna_tofu − NTA-dont give her a damn thing. She can go to court and get a support order just as easily as you could. There is a reason why he...

Some other comments from readers.

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MaxV331 − NTA you need court ordered child support, both of you.

HoshiJones − Well, this is ridiculous. Tell her to get court ordered child support, this is between Kathleen and Michael and the courts. It has nothing to do with you....

CelebrationNext3003 − NTA and it’s not your responsibility… his parents also shouldn’t be discussing or telling your personal business

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GonnaBeOverIt − NTA. That is up to her to figure out your only job is to protect and support your child.

rightbutbanned − What Kathleen gets from Michael is none of your business, and Kathleen has no claim on the funds that you are receiving from Michael as that is none...

eightmarshmallows − NTA. She needs to go through the courts to fix this, not you. If Michael finds out, he’ll stop sending you money so it’s pretty pointless.

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The_Bad_Agent − NTA Kathleen needs to handle this with Michael. Her kids are not your responsibility. Not your problem OP

The poster holds firm: money earmarked for one child stays there, full stop. Michael remains the core problem; redirecting blame to another struggling mom solves nothing. Have you dealt with uneven support from an ex? How do you handle family members who spill financial details? Drop your experiences below and let’s swap survival tips.

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