Am I Wrong for Prioritizing My Sons Over My Ex's Other Children?

AITA for not financially supporting my ex's additional kids like I do for our sons, prompting conflicts over fairness and responsibility?

Sophia

Published in Interesting
9 Jun 2025

Am I Wrong for Prioritizing My Sons Over My Ex's Other Children?

He thought shared custody meant shared responsibility, until his ex’s new family started treating his sons like the “extra” income source. OP is a 32-year-old dad with two sons, ages 10 and 8, and after the breakup seven years ago, he and his ex have kept things mostly even: every other week in the school year, and every two weeks in summer.

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Then April of last year hit, and suddenly the math changed. His ex asked for child support because she was stretched thin with her stepdaughter and her baby daughter, plus their household growing again since she’s pregnant. The judge agreed OP should cover certain medical and dental expenses, especially because his younger son needs regular medication.

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Now the complaints are rolling in, from summer camp costs to field trip “sharing,” and OP is stuck wondering if he’s being judged for doing exactly what the court said was fair.

Original Post

I (32M) have two sons (10 and 8) with my ex-girlfriend. Our relationship ended seven years ago, and since then, we have shared custody of our two kids.

This arrangement looks like every other week during the school year and every two weeks during summer break.

Up until last year, all expenses for the kids were split evenly between us. This changed in April of last year because she was struggling to afford all the kids in her household (our two, plus her stepdaughter and her baby daughter).

She wanted child support, but instead, I took over certain expenses, and the judge agreed it was fair. I pay for medical and dental expenses, and she no longer has to pay half.

Our younger son is on regular medication, so this alleviates the strain on her significantly because medical expenses were pretty costly every month, even with insurance. This was apparently not enough to make things equal between all the kids, and my ex and her husband have complained that my sons have a better quality of life overall than their stepsister, who is seven, and their half-sister, who is 15 months old.

My ex is currently pregnant again, so another child will be joining their household in the next few months. There were fights about summer camp because our boys are going this summer, but my ex and her husband cannot afford to send his daughter.

Before the summer camp issue, there was a field trip issue. They feel like I could "share the cost" or "gift the experience" to this little girl so she can have the same experiences as my sons.

My ex's husband told me I should feel responsible for ensuring all kids have just as much as my sons do. I asked him why I would be responsible for that, and he told me it was for the benefit of my boys.

He said a decent person would do everything to make sure all the kids in a family are given the same leg up in life. I told him that's something he should be doing, as he's the person who blended his family with my ex's, and I did not.

I told him he should be embarrassed to ask me to pay for his children to have a good life. My ex tried to convince me of this too, but I ignored her and then had my lawyer reach out and state we would move all contact to Our Family Wizard.

In return, she tried to sue me for child support, or she looked into it, but she was told that would not be likely because financially it would not be considered a requirement when I pay more for our children already, per last year's amended court order. I have been consistent about using the app, but my ex still brings up the topic of making things fair and equal for the other children in her home.

I have replied once on there, stating I will continue to support our two children but not hers. For now, she is keeping it all to the app, thankfully.

I don't exactly feel guilty about this, but I had wondered if people would find me a little petty for my hard stance on this. I could afford to help but choose not to, and I know the kids are innocent of all the issues between the adults.

That's basically the only reason I'll ask: AITA?

Exploring Parental Responsibilities

Parental responsibilities often hinge on emotional ties and societal expectations.

In this case, the OP's reluctance to support his ex's additional children may reflect deeper issues of fairness and emotional investment.

Research indicates that children from different relationships can often evoke complex feelings of loyalty and obligation among parents.

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Comment from u/lVlrLurker

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Comment from u/Dr_Brainwhisperer

That’s when OP started paying medical and dental expenses, and his ex stopped splitting those costs for their two boys.

Interestingly, psychological studies suggest that parents often feel a sense of competition with their ex-partners regarding their children's welfare.

When financial support is involved, it can lead to feelings of resentment and perceived inequality, particularly if one partner feels they are investing more than the other.

In this scenario, the OP's financial choices may stem from a desire to prioritize his immediate family's needs over those of his ex's children.

Comment from u/Usual-Canary-7764

Comment from u/Own_Walrus2834

The notion that fairness should guide financial support is common among parents, but it can be complicated by individual circumstances and emotional histories.

Addressing these feelings through open communication can help clarify expectations and reduce conflict.