I have to suck my girlfriend's flatmate's cock.

I was at my girlfriend's house because we wanted to get ready for a party together. When I suddenly had to pee, the bath was also occupied because her flatmate thought she needed a shower. Of course, knowing me, I didn't care and I just went in there. But I wouldn't have believed what happened next. He actually managed to persuade me to suck him off in the shower. Well, I forgot to piss after all, so I'll probably have to do it outside somewhere. Wet greetings from your Wet Wonder