She was going to reform him.
I knew a girl like that. Each BF was further down the ladder.
I think it was something along those lines. I met her in high school, and her family was strict. She got out of the house and the downward spiral began. I think she wanted to rebel and be the bad girl, but only in image. She thought she could tame the beast, not realizing she was gullible to getting played because she was a fine piece of a**, and guys would say whatever they had to.