I am just going to C&P since I am doped up on cold medication at the moment. D=
She's 18/19 years old and her parents are divorced, mom remarried and the guy is a total troll. She has an older brother by about eight years and he moved out, so now all she does is argue with her mother about her step-father. And because of everything that has gone on she has begun to have a purely physical affair with a married man (mid-late twenties) in order to make herself feel better - it's just not working very well. Ideally someone her own age will come along and somehow find out what has been going on and she'll inevitably fall for him and break off the 'relationship' with the other man.