You live in Bville. It's normal to hook up with your boyz honey.

I say, tell her how you feel first. Feel out her response for a hot minute. Then move in, or away. If she takes it in offense in any way (without telling her about the cheating) make a joke out of it. She knows you that well I would assume. But if she says she feelz the same. I say, introduce her to your parents!!!