Hello sr or madam
A few days ago I went to my girlfriend's house and things got heated up. We made out and I undressed her completely, she undressed me but we left my cotton boxers on because we didn't want to have our genitals rubbing and cause pregnancy. Still we are a little worried because she rubbed her vagina near my penis which caused me to release a bit of pre ejaculate on my boxer. What are the odds that the pre ejaculate could go through my boxers and get her pregnant?
P.S. She had her period around two weeks before this happened
Any help is much appreciated :)