Two months ago I (17f) stopped going to my mom’s house for her custody time because I would need to share a room with her boyfriend/fiance’s daughter. I say boyfriend/fiance because I don’t think they know if they’re engaged or not.

And they say something different almost every time they talk about each other. But they live together now with his three kids and there are only three bedrooms. Two of his kids are boys so they get one room and that meant I was supposed to share with his 12 year old daughter.

I was not okay with this and when mom showed me the house we were all supposed to move to, I told her I’d stay at dad’s. My parents already had me the same amount of time. This was just not bouncing between two houses anymore.

Mom didn’t take me seriously at first. But I was serious. I haven’t gone to mom’s house since because she’s always bugging me about running away from sharing and trying to make me spend the night. I don’t want it to be worse if I visit for a few hours. There is no way I’m sharing a room with her boyfriends kid.

My mom and I got into a big fight about it two nights ago. She told me coming for a weekend would be no big deal and I said it would be when I don’t have my own space and privacy. She asked how I’m supposed to bond with her boyfriends kids if I won’t spend time with them and I told her I don’t need to bond with them. She asked how she’s supposed to see me and I told her we can meet up outside her house. But I told her I was not going over to her house where she’d double down on trying to make me spend the night if not the full week.

Mom said I was being dramatic and rude and that siblings often share a room. I told her yeah, siblings do but me and her boyfriend’s daughter are not siblings. Mom told me that’s not entirely true and I said it is. I told her even if they get married we won’t be real siblings. And I told her she was not changing my mind on going to her house.

Ever since our big fight mom’s been saying I need to make it up to her and grow up. AITA?