Living with the fact that my girlfriend was promiscuous?

I'm deeply in love with this girl and have been for over a year. Problem is she was promiscuous. She's slept with around 50 guys admittedly. I don't know for a fact that she cheated before, but I'm highly suspect she did - as she was engaged once (which ended before a marriage) and married and divorced. That doesn't happen for no reason especially at the age of 26. But I feel like she's changed and isn't promiscuous and isn't cheating. The main issue for me personally is that it will haunt me especially if we have kids (she wants kids badly). I don't know if I'd be able to live with the fact that the mother of my children used to be sleeping around and possibly of cheated. I feel like it would haunt me. Is this normal for me to feel that way?
Living with the fact that my girlfriend was promiscuous?
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