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The original was posted on /r/AmItheAsshole by /u/cardamagepost on 2023-09-08 07:37:22.

My ex and I have a 7 year old daughter. I have full custody but I allow him to visit her and take her out when he’s in town a couple times a year.

My daughter has an underdeveloped bladder and bowel issues that makes it nearly impossible for her to hold it when she has to go to the bathroom. Once she tells us she has to go we have about 2 minutes to get her to a bathroom. Because of this, she wears pull ups during the day and diapers at night, during long car rides, and when we’re going somewhere where it’s expected that there will be long lines for the bathroom.

My ex was in town recently and asked to take our daughter to an amusement park/water park. I said yes, reminded him of her condition, and packed a bag with diapers, pull ups, a change of clothes, etc. with more than enough supplies for the trip.

He decided he knew better, threw away the bag, and took her to buy some underwear. She fell asleep in the car and ended up having a pretty big accident. My ex cleaned her up and cleaned the car as best as he could then drove her home.

I took my daughter inside and got her situated then went out to talk to my ex. He had the gall to ask me to split the cost to get the car cleaned since it was a rental. I refused because this wouldn’t have been an issue if he had listened to me. We started to argue and I eventually went inside to take care of my kid.

A couple days later he sent me a venmo request for half the amusement park tickets and half of the cleaning fee. I declined and now I have his family messaging me to say I have to split the cost because our kid made the mess. Some friends are telling me to just split it with him. AITA for not splitting it?