38 M4M Fat chastity cuckold seeking BBC for play

My girlfriend and I would like to make a kinky scenario come true, and possibly move to this being a regular thing if it clicks. She would like to see me getting fucked by a BBC while she gets fucked by our bull. Your role would only be to dominate and fuck me, no sex with her or our bull. Same bedroom and you can obviously watch, but the goal is a "humiliation" for me, so if you are into domming and get off on kinky scenarios, would love to see if we're a good fit. 6 foot 3, 280lbs white guy here. Safe sex only. Happy to discuss any preference or wants you have for the experience.

Thank you