OP, well you see. You need to get her close. Wait for the perfect time. Lean in gently. GENTLY
Then Punch her in her -blam!- face. Punch her to hard, she'l pass out from pain. Strip her down and tie her to a solid and sturdy object. Leave her there. And when she wakes up...
You know what to do....
EDIT: I dunno, just kiss her. If her face turns sour, flip a table and run.
[Edited on 12.10.2012 9:01 PM PST]