The slut will not learn...

"I've been too bad, sir. I did a very bad thing and still need punishment."
You grin, but quickly replace it with a stern face. "Alright then." You pick up the choker, fixing it around her throat and coiling the leash around your wrist until Kayla gives a little "hrkl...." As you do, you take the strap in the other hand and step back to give yourself room.
"Immm ready..." her words are strained and she looks back, her face quickly growing red.
You bring the strap hard against her **** ass cheeks, and she cries out in pain. Again...and again, the *crack!* of the supple leather against her reddening flesh plays counterpoint to her strangled cries. After about 10 strikes, her cheeks are crossed with red lines and you slacken the choker to give her some more air.
"I only punish you to keep you on the right path, pet." Your words are a gentle contrast to the cruel action of your finger as it jams its way into her pucker.
"Nnnnn!!!!" Kayla begins to buck and twitch, involuntarily moving away from the intruding digit as much as she can.
"Stop that..." you **** her with a sharp tug. "You better relax this asshole right now, or it's going to go poorly, Kayla..." she nods and tries to relax, and after that you can work a second finger in alongside, smiling as her whimpers get louder.
"Nnnnnnnn.... ooooh........ ahhhhnnnn....." she squirms, but stays relaxed. "Stretch my little asshole. Punish me, James..."
You remove your fingers, grabbing the lube.
"Beg for this lube, Kayla..."
"Please, daddy... please lube me up. I'll be a good girl, I'll be so good for you, James. I promise. Please cover your filthy little slut in that slippery stuff...." She's begging a mile a minute.
"Ok... I'm satisfied with that, little slut." You coat her asshole with the lube, working it inside with your fingers, then you coat the buttplug as well before working it slowly in.
"Ohhhhhh!!!!" Kayla's face is fixed with effort and concetration as she tries to accept the intrusion. The plug is long, but not overly wide, so it doesn't take long to slide it all the way to the rounded bit. Her asshole closes hungrily around the bulb, leaving only the flared end exposed.
"Soo.... full..." she shifts uncomfortable, and then shrieks as you strap her red buttcheeks again and again, occasionally pausing to give the buttplug a little jiggle.
"Hurt me, sir. Keep me on the straight and narrow...." Her eyes are glazed and she's sagging against the restraints. You think she might be close to losing consciousness, falling into subspace.
"Stay with me, girl." You release her arms and legs from their bindings, and she collapses into your arms, panting.
"Suck my dick." A simple command, and she immediately complies. She pulls down your shorts, and your steel hard boner smacks her in the nose as it springs out.
"You use your mouth, not your nose, you dumb bitch..."
"Yes sir."
She sucks with fervor and dedication, deepthroat and kissing up and down the shaft by turns.
"No hands..."
She obediently places her hands behind her back, and your grab her head and begin to facefuck her without mercy.
"Urk Urkk Urkk Urk!!" She making the craziest noises as you **** her throat, and she whimpers as the **** forces her onto her battered ass, and the buttplug gives a fresh inward jolt.
"Nnnn!!!!!" She's crying in pain now.
"It hurts, doesn't it? Like, say... $10,000 worth?"
"....no... not yet..."
"Good girl. You're smart." You throw her down onto the grass, ass in the air, and start to piledrive her pussy as you work the buttplug against her sphincter, pulling it almost free, then letting in slide back in. With a free hand, you press her face into the dirt.
"Is this what you wanted, Kayla?"
"Y...Y...Y.. Y...es....D....d....a.....d.d....y....." her eyes flutter, and you slap her ass with your palm. Her shriek of pain is muted, and her eyes continue to flutter. She's slipping away into lala land. You pound harder and faster, until you feel the need to release.
"Get ready, bitch." You roughly flip her onto her back, and drop heavily onto her stomach as you jerk your cock furiously. She grunts as the air exits her lungs.
"G....ive...it to me....sir...." she's teetering.
"Here it comes." You climax, shooting rope after rope onto her tits and face. Her face is a mess of dirt, grass and sticky seed, and you laugh as you rub her face with your palm, smearing it all over.
"Good girl..." Kayla's pilot light is blown. She's dazed, not even flinching when you pull out the buttplug.
"Come on girl." You pick her up gently, carrying her into the tub. The bubbling water brings her around, and she holds you tightly.
"Tha....thank you, James. That.... that was incredible. I never.... I never knew how good this kind of stuff could be."
"So... you want to keep doing stuff like this then?"
She looks into your eyes. "Absolutely...as long as... that's okay with you...." she smiles... "..sir?"
You hold her tightly, stroking her cheek and kissing her lips gently. "I guess your thievery was the happy accident that led us to this, huh?"
"I really am sorry, James."
"It's okay, I forgive you. That way, this...relationship... will just be about you and me, and not your debt." She smiles.
"I'd like that.... daddy."
After you clean up and put away the evidence, Kayla heads home, though... she does ask to keep the buttplug, and slides it back into her ass before pulling on her shorts. "I need to train, James. You're going to be taking my ass a lot, so I need to be ready for that monster..." she gives you a passionate kiss before swaying awkwardly up the hill to the house. She walks like she's been fucked sideways, and you laugh because that's exactly what happened.