what do i do?

so both of my moms boyfriends have touched me, the first time it happened i was 5, and the second time i was 8, and they were two different men. i was talking to my mom abt the first man, and how he was abusive, she said that she left him bc he was yelling at my brother one day for watching TV. i wanted to tell her what else he did but i can never bring myself to do it, and the second guy who had done that to me is still in my life, before he had done it i asked him to be my dad and its been almost 7 years and i dont want to tell him why im not comfortable calling him dad anymore bc now im realizing that what he did was wrong. but i feel like it would ruin my mom and his friendship and i dont wanna do that to her bc they have known each other for half their lives. i just dont know what to do, i just wish j can forget anything happened.