Enjoying a huge cock up his ass too much

My chattel has served me well the last week, tomorrow he will return home. i teased him every day without allowing an orgasmic release, so i will give him the chance to have one. but it can only happen at the same time as i'm fucking his man-pussy with my massive black strap-on cock. the sissy can only cum when i'm using his holes for my pleasure. his locked dicklet is fully aroused, even before i remove his steel cage. but even hard it can't stand any comparison to my superior cock; my cock is the one that will fuck and my sissy will be the one fucked. such a huge cock, so deep up his hungry ass; the slut seems to enjoy this so much that he isn't rushing to cum when given permission. maybe he doesn't deserve it then, maybe anal pleasure is all he gets today?..