Female Gangbang

Ever since my fiance told me one of his fantasies, I can't get it out of my head. I've never been able to find porn that accurately depicts what I/we want. What he, and now I, fantasizes about is a reverse gangbang. Sure, you can find that anywhere. The difference is - the women have control and are basically using him as their fuck toy. He is surprised by one female, who gets him subdued and tied up. He's also blindfolded. There are at least 4 women, with one riding him, one sitting on his face, and the other 2 using his fingers how they see fit. He is obviously enjoying it but fights that internal battle of feeling like he's cheating on me for enjoying it. Little does he know that I orchestrated the whole thing and I'm standing right there. I motion for the woman riding him to move. I'm wearing a strap on, and lube it up. I walk over and start to put lube on his ass, and he squirms. One of the others slaps him. I slowly enter his ass and fuck him while jerking his cock. He has the longest and most intense orgasm of his life. He's cleaned up, then we all start going at him for round two...