Definition: Given a real-life anecdote of a complex ethical situation, generate a suitable title that describes the main event/root cause of the situation. Imagine that the given text is a social media post, and you have to write the title of the post, so the users can decide to read the main text or not.
Input: I have 3 children with my ex husband. My kids and their cousins are all middle/high school age. I will keep this concise:

My ex usually has the kids every other weekend. He tells me he needs to switch weekends for work. Ok, fine, no problem. Then he tells me he promised a sleepover with his sister's children (my children's cousins) that weekend, so they will also be coming over. I tell him absolutely not. He's mad at me about this and so are my kids now.

I've only seen my kids' cousins once or twice in almost 10 years, since the divorce. I'm sure they're great kids and my kids love them, but I can tell their cousins feel awkward around me. I completely understand that, because we were never close enough justify keeping contact after the divorce, especially since they were young when it happened. I just don't want to spend my weekend with my kids feeling that kind of awkward tension. 

For the record, I called my ex's sister and explained the situation so she could reschedule and explain to her kids and she seemed pretty horrified at what her brother did.

My kids and ex are very pissed at me though. AITA?

not wanting to supervise my kids' sleepover with their cousins