So I've been in a relationship with this girl now for 6 months altogether.
Before she was seeing me, she used to go out with this one boy and they were talking for quite a while it seemed and she did lose her virginity with this boy but she goes on about how he seemed to be controllive at times and used to make her do things she didn't really like that much.
When she first started talking to myself she used to say how she stopped talking to everyone else and just concentrated on me, however over the past couple of months it turns out she has still be messaging with this boy and he keeps telling her at times to "suck him off" and even then went onto to say about cheating and "he forgot how hard it is to cheat on someone, so you should just do it and forget".
I've told her plenty of times i don't mind her at all talking with anyone, except with this one boy simply because of this reason. But she always goes on about how she doesn't like to have enemies and likes to keep peace with this one but i just feel uncomfortable with this.
How should i play this? Tell her straight out to stop otherwise i'm going? Shall i message the actual boy myself, if so, what should i write to him?
I'm more of a face-face person, I want go out of my way to fight anyone as i do see it as pointless, but i'm not scared in most scenarios if i have to.