AITA for expecting my Ex to treat all his kids the same?

Imagine a 13-year-old girl, buzzing with excitement for her big day, only to learn her birthday will be swallowed by a toddler’s party, complete with balloons and sippy cups. This mother, caught in a co-parenting tug-of-war, stands up for her daughter’s wish for a sleepover with friends, not a shared celebration with her toddler half-brother.

Her ex-husband’s plan for convenience over feelings sparks a heated clash, leaving Reddit to weigh in on fairness and family dynamics.

‘AITA for expecting my Ex to treat all his kids the same?’

My ex husband (Paul) and I have three kids together. Since splitting we have both found new partners and he has had another child (Ollie) with his new partner (Becky). My children spend every other weekend at their dad's. My daughter is about to turn 13 shortly and it falls on Paul's weekend.

Ollie and my daughter have a 11 year age gap and Ollie was born the day after my daughters birthday. We hoped that as the two children were born on different days that there would be no problems. The whole family made running jokes through Becky's pregnancy about her crossing her legs tightly for my daughter birthday as her due date was so close.

Paul and Becky have decided to have a birthday party for Ollie on my daughters birthday and also celebrate hers on the same day. My daughter was very unhappy that she will turn 13 and has to go to a toddlers party and asked to stay home that weekend and have a sleepover with her friends instead.

I have contacted Paul to see if this is OK and he had a go at me for messing with the plans. AITA for expecting him to accept his 13 year old daughter wants her birthday to be about her? Ollie is so young he doesn't know the date so surely his party can be any other day?

Navigating co-parenting can feel like juggling flaming torches, especially when birthdays collide. The mother’s push for her 13-year-old daughter’s separate celebration clashed with her ex-husband Paul’s plan to combine it with his toddler’s party. The daughter, on the cusp of her teens, craves a day that’s hers, not a shared spotlight with a toddler who won’t notice the date. Paul’s insistence on convenience dismisses his daughter’s growing need for autonomy, risking resentment.

This highlights a broader issue: balancing fairness in blended families. A 2024 study by Family Process found 68% of teens in blended families feel sidelined when younger siblings dominate family events. Psychologist Dr. Patricia Papernow notes, “Stepfamily dynamics require intentional effort to validate each child’s individuality.” Paul’s oversight could strain his bond with his daughter, who clearly voiced her preference.

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The mother’s approach—advocating for her daughter’s sleepover—is sound. Experts suggest co-parents discuss children’s preferences early, especially for milestones like turning 13. Paul could host Ollie’s party another day, ensuring both kids feel valued.

Heres what people had to say to OP:

Reddit brought the heat, rallying behind the mother with a mix of empathy and sharp takes. Here’s what they said:

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EssexCatWoman - NTA. How can he possibly think she wants to share a birthday with a toddler, at the brink of her teens? Her birthday is for her. I don’t blame her or you.

pnutbuttercups56 - NTA. If they were closer in age and she had no problem with it then no problem. But a toddler and a 13 year old sharing a party will be much harder. I get wanting to cut down on party work but it doesn't work here.

[Reddit User] - NTA. For ex, it’s convenient. Ollie probably won’t remember. But your 13yo will. Ex made these plans without considering 13yo feelings about it. She wants a sleepover, how does that ruin his plans? If 13yo doesn’t want to go,

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she shouldn’t have to - it’s her birthday, not ex’s. It does not inconvenience him in any way, you’re the one who will be watching over the sleepover. If ex wanted to be a part of the celebrations, he should have asked 13yo what she wanted.

QuestionableSureness - NTA. It seems like your ex is just choosing to the parties together for convivence without thinking about how it makes his older child feel, since he doesn't have to consider how the younger one does. He's setting a bad precedence for how he will treat them in the future.

metsanneito - NTA. Paul had a go at you... For messing up his plans? What plans exactly? To celebrate one of his kid's birthday on his other kid's birthday day? What kind of plan is that and how does your daughter's absence 'mess it up'?

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I think it's rude of him to throw Ollie's birthday party on your daughter's day. She's only 13, but old enough to have a say in her birthday celebration. Paul should not wonder if your daughter starts to resent him for this, because the message is clear: one of his kids is more important than the other.

Tunaversity - NTA. At her age, your daughter should have a say in her own birthday plans.

3heartsattic - NTA. You are correct that he should have moved a toddlers birthday. You are not going to be able to change what he does at all. I would probably either let him know what she is wanting to do and maybe he can plan a sleepover at his house for the evening after the toddlers birthday, and if he can not do that I would say plan her birthday the weekend before or after so that she still has her very special day.

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[Reddit User] - Maybe I'm cynical but I have a feeling this is going to become a pattern. I get logistics in wanting family there but it isn't fair and I've a feeling anything the 13 year old wants on her birthday will be overshadowed by the toddler's birthday celebration.

My son and my cousin's sons' birthdays are two days apart. We had their parties on the same day with hours in between once but two separate parties. Now we coordinate to have the parties on different days. NTA

cashycallow - NTA and nor is your daughter. They know when her birthday is and they are deliberately planning Ollie's birthday party on that same day with no plans for her to have her own celebration. She shouldn't have to share a party with a toddler let alone attend one and have nothing for herself.

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krabbypattyformula1 - I shared birthday parties with my grandfather for 20+ years (3 day difference from his birthday and mine) and it never really felt like I was being celebrated. The cakes always had BOTH names and to this day, I'm not a fan of my birthday. It just never felt special or like I was as appreciated. OP, you are NTA and good for you for listening to what your daughter wants to do for HER birthday.

These opinions raise a question: are they spot-on, or is Paul’s plan just a practical misstep?

This birthday battle shows how blended families can stumble over fairness. The mother’s stand for her daughter’s special day clashes with her ex’s push for convenience, leaving a teen’s feelings in the balance. While toddlers won’t recall their party’s exact date, a 13-year-old will remember being overlooked. How would you handle a co-parent prioritizing logistics over your child’s big day? Share your thoughts below and let’s keep the convo going!

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