Me (16f) have two sisters, a and b. (A22 B21) B has a boyfriend (40m) who is the father of her child. Today A was visiting and suddenly she looked at her phone and had the most shocked face, I asked her what was wrong and she signalled me to come look. I look on the screen and see that B has confessed to cheating with multiple different people. I don’t think anyone else knows except for us and I’m scared of what could happen, I’m going to keep quiet for now but I don’t know what to think of her anymore. She had done it once in. A past relationship but they were very toxic and she had a lot of dramatic relationships, so A thinks it’s self sabotage because her brain is wired to “create drama” but I think she just doesn’t care about him and wants the drama just because. Once again he doesn’t know yet and I don’t really plan on telling him because that isn’t my place, I’m scared she will tell him or find out when the baby is around and he will flip out. Can someone give me advice? (Edit) Just to clarify, they met when she was 18 and they dated then (gross I know) none of our family really liked it but it was her choice and she’s stubborn asf. They broke up for a while and Tim that time she realised she was pregnant, Anyway so we do know that it is his baby since she took a paternity test since there was two guys that could’ve been the father, not judging her because this was all a surprise at the time. Oh by the way her bf was in jail for the time they weren’t together because he had hit her (so abusive and toxic) and she still went back 🙄 I’m gonna keep my head out of it, but it’s changed my pov of her entirely. Idk… i like haven’t texted her or talked to her since the day I found out, I feel bad but it’s like idk how to feel or think. 🤷🏼‍♀️