Me and my girlfriend had gone to see a film as we usually did most Saturday nights. We always sat at the back and got up to a little "frisky" business, but it was all in good innocence. However, one time - in fact, the last time before I broke up with her, I felt her reach for my crotch and start rubbing it gently. I returned the favor, and about 20 minutes later, she was on top of me with my hands under her panties, rubbing her wet pussy. About 3 minutes later she came! Once we walked out of the cinema, I noticed this white stain on my jeans. Needless to say I was embarrassed when I noticed the cashier staring at my crotch!