buddy and i were close in college. had been dating this girl for a few months. she shared its a fantasy of her's to do mfm threesome. really didn't see myself marrying this girl so asked bud if he'd be down. he agreed and we set it up. things are going well and drinks are flowing and clothes start coming off. step out of the room to go to the med cabinet to grab him a condom. by the time I came back dude was already fucking her which wasn't planned. just by the noise I could tell she was soaking. stuck my cock him her mouth and she was sucking me off. about 10 mins passed and start to hear him grunt. too shocked to even react to what's going on. she pulls my cock out of her mouth and says "yes cum in me" as he blows his load in her. he pulls out of her. he tells her to spread her legs apart and she listens. instinctively look down and her groin to see it swollen. he tells me to take a pic of her and for god knows why I do. pic related. he tells me "you're up". go to fuck her and notice how wet it is. realize its a mix of his cum and her juices in her. gf asks me if I'm okay. tell her yes. she says "you can cum in me too" instantly bust. clean up and say our goodbyes.