The problem with certain relationships is that you find that if you have a sordid past it can effect your future relationships. Some people have been more 'active'; I don't know if that's the right word to use, as I don't want to offend, but at the end of the day, you'll always find a problem within the concept of your past relationships.
Now talk-the-talk; I felt the same with my last relationship. It was weird as you fall into the love trap, yet constantly beat yourslef up, by thinking about your partners past love life.
It's easy to say to you; "don't think about it", but unfortunately, that is what you have to do.
Talk to her about this, without causing an arguement or fight. Let her know how much you love her, so much so that you find yourself being almost....Jealous of her past.
I'm sure she will understand.
But I must admit, I do kind of agree with spirit's argument....Mind you, do you really want to live in silence?
Kitty
xx