Cook- As a 27 year old guy who has dated several types of girls, both those that were very pure and those that weren't so pure, I know where you are coming from. For this issue, you have to look internally. Was there anything you did in the past that you regretted? Were you ashamed about certain things in your past? It is just that though: the past. It sounds like your girlfriend has changed into a different person (or so it seems like). So just let it go. It's in the past. She is a human being and although in this particular case promiscuity may seem like a dirty habit, I'm sure she lead that kind of lifestyle for a reason and all she wanted was to feel loved just like all of us do. So be kind to your girlfriend especially for your kid's sake. It is your child's mother and she deserves the utmost respect. Instead of trying to make her perfect, forgive her for her downfalls and love her as is. What's past is in the past. And just because she may not have had a great past doesn't mean she doesn't have a bright future. Like I said, don't try to wish that she were perfect. Instead, try to be the best that YOU can be and be a good influence on your girlfriend. You can't change her but if you act the right way yourself, she will see that and take notice. Good luck to you, my friend.