Bigtitted Stepmom In Threeway - A realistic and candid look at blowjob and relationships. My girlfriends and I have been friends for several years now and before we started dating she told me she wanted to get a threesome with me, and not a boyfriend. So needless to say I was dumbfounded, but then again, who is this woman anyway? The answer is that she is my girlfriend's bigtit stepmom in threesome. Here is what happened between us: We had been emailing back and forth about the subject of getting a threesome and she sent me pictures of her stepson having some good old fashion fun.