Well, if she's been on the pill longer than a week and isn't a retard and remembers to take her pills around the same time every day, then it's not a big deal at all, so long as neither of you have the clap or something weird like that. Afterward, she should probably sit on the toilet, stick a couple fingers in herself to break the cooch vacuum, and squeeze the cum out, or it'll eep out later on when she's walking around. Bad deal if you're like me and don't wear underwear.