Sex With A Guy And Threesomes

Re-post with added content

Im pretty liberal about sex. Im fine with most forms of sex as long as its not abusive. I have never been sexually attracted toward men per say, but i REALLY love anal sex, giving and receiving. So much so, in fact im fine with fucking and being fucked by guys; assholes feel amazing regardless of gender.
Lately, i have been having some intense fantasies regarding having a 3some with a bi BBC. The thought of watching my girlfriend getting fucked by a big dick really turns me on. Not only watching, but doing a double penetration, double vaginal, and double anal drives me wild. I want to suck his cum, and my cum out of my girl's asshole, and go ass to mouth from her ass and my ass. She's reluctant to discuss it because she still thinks it will upset me, but she has fantasies about double penetration and BBCs, which is fine by me.