Tony was a real Lothario before his relationship with Pepper Potts. After a night in Vegas, he met Vanity Fair reporter Christine when she tried to get a scoop.
Tony complied, but planned to seduce her and waited for chance to use his suave techniques on her. Christine eventually slipped up, and Tony charmed her without much effort and they ended up in bed together.
Tony had Christine on top of him and he did very little during the kiss. While Christine lead the session, Tony groped her. Tony was obviously very good at it, even if he took the more submissive role, as Christine was moaning very loudly with pleasure and Tony, in turn moaned a bit.