I wouldn't just go up to her and say "Hey! Do your parents let you date? Because, I'm willing to tap that ass, you see...." That would scare her off. Instead, ask a question over MSN like "Do you have a phone number that you answer? I would hate to call you and leave you a dirty voicemail." Grab her number, go for the flirty thing, bond some more, and then go for the kill.