This happened in real life to a good friend
she met this guy, everything was hunky dory for the first few months
until she mentioned to me that he was carrying a secret that she knew would have me demanding that she break up with him.
She told me...and she was right.
Homebody molested his own fucking SISTER while high off some shit
but since the sister supposedly forgave him, shit was kosher with her too.
For the time she was with him in an official relationship, our friendship suffered. They later broke up for reasons unrelated to the abuse but related to him being a complete asshole.