My girlfriend has only ever dated black guys. She has 2 kids. When we started dating she was dating another guy. She would do anything for him. She drove 60 miles round trip to sleep with him whenever he was available. He is married by the way. I also saw a lot of their texts to each other, including pics she would send him and they were very explicit. She isn't willing to engage in any of these things with me. I have been dating her now for about 6 months, we live together, but I feel like she is settling for me because I am safe. However I want her to be as free with me as she was with him. When we started up we said "whatever happens, happens." She was much more outgoing then, while she was seeing both of us. I don't mind her past, but she has completely changed sexually since we started seeing each exclusively. She just lies there. Looking for advice on how to talk to her about this.