Give her an important task...

Things progress quickly. You don't have forever to spend fucking Kayla methodically in every way that you want, slowly wringing every ounce of pleasure that you get from dominating the stupid little slut. You transition from the rough blowjob straight into forcing her face-down into her bedspread and taking her asshole roughly, only pulling down her panties far enough to get access.

"You're so pretty, Kayla. And your body gives me much pleasure." the gentle tone of your voice contrasts with the rough and savage fucking. "But even so, you aren't enough. I have a big appetite, little slut." you push her face harder into the fabric, and she starts to squirm. You know she can't really breathe. "Don't you think I deserve more? I'm sure someone with your people skills could find.... others... like yourself." You let up a little when her squirming intensifies, and she sucks air in through the sides of her mouth.
"Bt...srr...." she mumbles into the comforter. You pull out of her asshole roughly at the backtalk, and strike her cheeks hard with the belt.
"What?" your voice gets cold as you strike twice more. "What's that, bitch?" you grip her hair, wrenching her head up so you can cinch the belt around her throat, tightening it down.
"I don...wanna...share...." she cries and whines as her airway is restricted.
"I don't care what you want, Kayla." you tighten further. "You're just a pretty little set of holes." her eyes bulge. "If you don't please me, I'll throw you away and find another. But if you do as I say, I'll take such good care of you. My top slut." You flip her onto her back and stare into her eyes. The tears still leak uncontrollably, but she nods now.
"Yes, sir. I understand now. I can do what you ask." she doesn't sound 100% on board, but she will obey.
"That's very good to here. I'd hate to have to trash such a beautiful piece of flesh." you pull her panties off, and begin to fuck her pussy with strength and speed, with one hand roughly molesting her fake tits while the other keeps the belt-leash taut enough to raise the flesh of her neck around its edges. "Take my cum, slut."
"Ysss...dadd.y....." she knows her place once more. Perhaps once day, there will never be any back talk from her, but you think you'll actually be sad that day. Her small reserves of resistance to this arrangement make everything that much more enjoyable. You need new pets...full of will and defiance, to break down.
You cum, squirting her pussy full of your spunk, and then head to the bathroom to clean up.

when you re-emerge, Kayla is panting on the bed, rubbing her neck and clit as white seed dribbles freely from her well fucked hole. "Remember your duties, now little slut."
"Yes sir." she nods, dazed.
You leave, heading home and pulling into the driveway around 2:40 PM.