OMG, why the hell is everyone attacking you?! I would have done the same in a heartbeat if I thought for a second someone could hurt my sister. You found two cards for HOOKERS- that is no doubt a deal breaker in my mind and surely my sisters. I don't care how that info was found out, now she knows (well she will when you tell her) and if I were her, he'd be long gone. Sometimes the ends DO justify the means.
I honestly question the people on this forum that only one other person has come to your defense.