Perhaps my character is an older woman in her late 30's or early 40's and your character is younger, like maybe college age. You have a very good disposition and have a pretty boy look. Nobody suspects that you hide a darker side, one that is angry and prone to abuse. How our characters meet would be something we could work out. Maybe my character works at your college?
You are charming and highly intelligent. You go above and beyond to seduce my character which she may resist at first but eventually they begin a relationship which starts out wonderfully. He treats her well and she trusts him. Slowly, he becomes more controlling and angry which leads to an abusive relationship and even rape.
We can work out further details. If you are interested please send me a pm!