I (30m) accidentally called my girlfriend (23f) “baby sis” while we were fucking the other day. We had just gotten back from the gym and we were both horny as can be. We did our usual kinky warm ups for sex. That day was just hitting a little different. I was fucking her hard in doggy and I don’t know what came over me but I bent down to call her a pet name and my brain pulled a fast one on me. Instead of “baby” or “slut” I called her “baby sis”.

At the time I didn’t know it but she’s a fan of incest porn. She came IMMEDIATELY on my cock when I called her baby sis. It was incredible. She made such a load moan of pleasure that I came instantly. It’s safe to say we have our new role play fantasy. Never thought my girlfriend and I would be such taboo perverts.