I want to grind it between her ass

(In progress)

You guide her in, and bend her over the bed. With her arms stretched out, her pendulous breasts rest on the sheets, but you have something more important to focus on. With a firm spank, she gets the picture and spreads her legs, eager for you to continue. You strip out of your pants to free your cock, as she simply pulls her robes up, exposing her ass. she wears a tight, satin thong that must be magically enchanted the way it hasn't snapped under the breadth of her ass. you yank it down her legs as she gives an excited yelp. When you slap your cock down between her ass cheeks she gives a second yelp, before letting out a long, sigh. She starts to bounce her ass for you, before you deliver another hard smack to her flank. You're in control here, and when you want her to bounce her ass, you'll give her the order. She responds simply "Yes, your majesty." At the end of her agreement, her voice fades into a whine as she feels you thrust your meat against her. There's a bit too much friction, but of course with equipment like yours, you knew to come prepared. You reach over to your nightstand and retrieve a bottle of oil, which you pour over your cock, nestled against her ass. You continue to pour as you thrust, letting your dick be the applicator to her own flesh. Once there's a good balance of friction and slickness, you begin to pour the rest of the bottle over her backside. You rub it in, eliciting moans and praise from your partner. By the time the bottle is drained, her butt shimmers in the setting sun. You feel your dick thrum with vigor, and given your position, Omira feels it too.