my boyfriend cheated with my older sister.
i 20f recently found out that my boyfriend,21m, was cheating while looking through his texts with someone named “mommy”, but i also found out a few hours ago that it was my sister 27f who he cheated with. im not sure what i should do with this information because i thought family stuck together. when i first found out he cheated i went to my sister to talk to her and she took me out to get my nails done and get lunch but now that i know she lied im not sure what to do. should i break up with my boyfriend and confront my sister or keep acting clueless? me and my boyfriend were together since freshman year of high school and im scared of losing him but at the same time i feel like i cant just stay with a cheater.
(update) i made dinner plans with my family for friday and invited my boyfriend, im gonna confront them then and i’ll let you guys know how that goes.
(final update) i’m sorry for the late update it was a very rough night. i invited everyone to dinner at my place and when everyone sat down to eat i stood up and told everyone i needed to say something and that is when i told everyone what happened. the look on my sisters face was absolutely priceless but my boyfriend started saying it was a lie and that i was acting crazy. this is when i pulled up screenshots that i sent to myself from my boyfriends phone and showed everyone. my mom was furious with my sister and my dad didn’t seem to care about the whole thing. my mom told my sister to leave and said she needed to have a talk with my boyfriend. this is when things got worse, he started saying that i made it up because “i don’t get enough attention” and started insulting me, this is when my dad actually decided to step in. my dad started screaming at my boyfriend and told him that he was absolutely disgusted with his actions and that he didn’t want him anywhere near me or my sister. after that me and my NOW EX boyfriend when outside and i officially ended things after telling him how awful of a person he is, and for my sister i’m not sure what’s going to happen, she hasn’t texted me back and i haven’t heard anything since.