AITA Fir Calling My SIL A B-Word For Making My Pregnant Wife Cry?

Still heated about this but I’ll try to keep calm while writing this.

My Wife (27F) is 8 months pregnant. My wife has always been sensitive so I’ve (28M) had to be more mindful than ever and make sure I do everything I can to make sure she’s not having any problems. I do everything for her and I couldn’t be more happy doing it because of what she has to go through to give birth.

My SIL (31F) who’s single and doesn’t have kids, was visiting because she wanted to “help” my wife. SIL has never liked me but I’ve never cared about that. My wife wanted her to visit so I was cool with it. A few days ago, I had to drop off some stuff at our storage unit. My SIL was in the house so I’d assume she’d help my wife with anything she needed. I gave my wife her ice cream, and she was happily watching Netflix. I was gone for about 25-30 mins. While I was gone, my SIL decided to take away my wife’s ice cream and close the tv telling her “it’s not good for the baby.” Obviously at this stage my wife has trouble standing up by herself. This upset my wife and she started crying.

My SIL for some stupid reason decided to leave my wife alone in the house while she was crying. With her crying and the baby pressing on her bladder, my wife had a full blown accident. When I got back at the front door, I could hear my wife crying and sprinted in where I found my wife in the mess she was in. I called for my SIL but she wasn’t in the house so I had to call her . She picked up saying she left because she had an appointment. I told her what happened and she pretend to act surprised. I closed the call because I couldn’t deal with her bs. I was furious because if she had told me she was going to leave, I wouldn’t have left my wife unattended.

It took a while but i got my wife to calm down and she told me what happened. She tried apologizing for being a “pain” but I stopped her from doing so as nothing that happened was her fault.

I called my SIL after telling her my wife told me what actually happened. I called her a crazy b-word and a he said I was overreacting which I found crazy.I then called my MIL and to no surprise, she took my SIL’s side saying I shouldn’t have gone out.

I’m done with seeing her family members treat her like this. They’ve got no respect for my wife and to do something like this while she’s pregnant is crazy. I don’t want anything to do with those kinds of people.

AITA For Calling My SIL The B-Word And Expecting Her To Stay Till I Got Back?