Using My Bound and Locked Slave as My Personal Human Strap-on Dildo

My naked boyfriend is completely tied up and on the sofa. I’m dressed in sexy fishnet leggings, a shiny mini skirt, a tight leather top, and my signature latex mask with glossy purple lips. His cock is securely locked in a steel chastity cage, and he’s wearing a strap-on harness with a big, thick pink dildo. On top of that, he’s fully blindfolded - just a silent object for my pleasure. I lean in and push a big black ball gag into his mouth, buckling it tight. I sit on his lap, slide the fat pink dildo deep inside my dripping pussy, and start riding him hard in cowgirl position. He can feel my body, hear my moans, but gets zero pleasure for himself. I grab a butt plug and push it into my ass while still riding him. I tell my locked slave to fuck me - and he obediently starts thrusting his hips, pounding the strap-on into me faster. Then I turn around into reverse cowgirl, riding him even deeper while rubbing my clit until I cum hard all over his Strap-on.