My roommate “Ava” (F24) and her bf (M25) have been together for about 2 years. She worked for his father (not anymore) and he introduced them, idk the whole story. He’s a sweet guy and gets along with our friend group very well. Him and my bf are also best friends and this made my issue 10x harder.
Ava and I aren’t the best of friends but being roommates were close. It’s just us two so sometimes on drunk nights we’ll sit there and laugh all night about the dumbest shit. One night Ava came home drunk out of her mind. She started going on ab having the best sex of her life and saying she doesn’t know why she hasn’t “tried older men” yet. I laughed it off and tried to send her to bed bc I thought she was joking. She ended up getting into my bed and showing me her phone.
She starts showing me PICTURES OF THIS MANS DAD. I almost threw up. She then goes on about him being her bfs dad and to not tell him. The next morning she still remembers the night and starts crying telling me to not tell anyone and she’ll figure it out. I asked how long, and she said it’s been two months. A few nights later I come home from work to this man and her in our apt. Our apts tiny so she heard the door open and ran out of the room. I asked if her bf was here and she looked at me laughing saying it was the dad. I told her she was disgusting and I wanted him out and left. He ends up leaving and she texts me to come back to talk.
She told me not to tell her bf or mine or she’d be pissed and it’s not my place. She said she needed time to get the right words to say and that she’ll tell him when she’s ready. We usually hang out often with her bf so it’s been so difficult not saying anything. Most recently I come home to Ava and a couple of her friends drinking and talking ab the dad. They’re all talking like what she’s doing should be idolized. I didn’t engage but I was in the kitchen when I hear her say he’s coming over again tonight. I yelled not in this house. That turned into an argument and her calling me a bitch saying it’s her place too. She said it’s her relationship and to not get involved. I told her I’d give her a day to tell her bf or I’d do it myself. The next day she thought I was joking and I see her leave with a bag packed getting into the dads car. I was fed by this point and go to my bfs house drowning in tears telling him ab what she’s been doing. He was beyond pissed and told me he’ll tell him. I get a text saying her bf came over and he told him everything and he was broken into tears. She came back the next morning screaming at me saying I was a bitch who had nothing better to do to then involve myself in other peoples shit. She said I’m just bitter bc “she can satisfy two men while I can barely handle one”. I left and I’m staying with my bf for now and I’m getting messages from all her friends saying I’m an AH and that she’s going through sm rn and I shouldn’t have added to her stress. AITA in this situation/ should I have let her tell him?