I'd been wondering when she would ask that question, but I never had any doubt how I would answer it. "A while."
I occupy myself between her breasts. If I'm honest, what I'm doing here is letting go of Isobel by enjoying the better features of her submission. Like all women, she's worthless alone, but malleable for a man. As always, my work on her tits is rewarded by arousal, but with the assistance of the aphrodisiac I administered, that arousal is far more profound than usual. She - I'm thinking of her as She now, as though it's her name - twists underneath me. Her thighs press towards each other, but I'm between them, preventing her from closing her legs.
"What does my bitch want now?" I ask.
"Please sir. Please. I want your fingers, sir," she pleads.
"Where do you want my fingers?"
"Inside me, sir."
This is one of the few bad habits I haven't yet managed to break her of: euphemism, attempting to defend herself from embarrassment by failing to use clear language with her master. It is, however, a simple enough problem. I reach up and shove three fingers in her mouth.
"Like this?" I ask. "Oh, I like this." I thrust my fingers back and forth, seizing and releasing her tongue.
"Mmph, mmmph!" is the only noise she can make. She makes it urgently.
"I bet I could fuck your throat like this, don't you think? Shove all these fingers right down, see how your deep throat training paid off."
I arrange myself to kneel over her and keep working my hand in and out, deeper each time. Her head sinks back to the pillow. There's beautiful desperation in her eyes as she struggles to open her mouth wider over my knuckles.
"Wouldn't you like that, slut, feeling Sir's hand bulge in your neck? I bet you wouldn't be able to talk for days." I have fond memories of the days when I had her wearing a deep throat trainer around the house, and shoved bigger and bigger dildos into her esophagus every hour. Even with her mouth empty, she could barely speak. I'd take the dildo out entirely every few hours, give her a drink of water, and let her whisper hoarse devotion before I slotted the next size into place. Every step in her gradual degradation has been lovelier than the last. I picked Isobel up in a bar because of her gorgeous self-possession, but she's far more attractive now that she's powerless, broken to serve the way women should be. That careful training in submission keeps her from resisting now. She knows what I want, and she wants to obey.
When I finally have mercy and slide my hand free, her gasp is all gratitude. "Th-th-thank you, S-sir."
"That's right," I tell her. "That's what a bitch should say when she's used." I have to remind myself not to kiss her mouth. The aphrodisiac I gave her would keep me hard and horny for days. Instead, I slide my hand between her legs.
"Oh, what's this?" I tease. "My cocksocket's clit is like a little rock." I toy with it a little, push the hood back - not that there's far for it to go - and twist her clit between my fingers. "I bet this hurts," I tell her. "I bet this hurts just like all those guys balls that you didn't sleep with in high school. Let's get some revenge for them, shall we?" I twist harder, and take a clamp out of the nightstand drawer. "You know I stocked this with good little pain toys, and told all the guys where they are. Just in case they want to hurt you." She mews as I fasten the clamp and stroke my hand down across her slit. "This is just how I like you, stupid slut. Swollen and dripping."
She's appallingly wet. At least a few of the guys are going to complain she's too slick, but they should still be able to have a good time with her ass. Plenty of cum will get worked into her pussy just the same.
"That's right, silly bitch. You're so horny, aren't you?" More mewing. I pinch a bruise onto her mound. When she's all there, that makes her scream and curse, so it's a good test for verbal coherence. I get back wordless little shrieks, hip thrusts, wild-eyed moans. "Oh, you're so ready. Ready for me to let the whole gang run a train on you." I settle my fingers for another sadistic pinch and lean down to her ear. "Let me tell you a secret. The stuff I gave you has fertility meds in it, and breast hormones. You're just about peak fertile right now, and these boobs," I run a hand over her breasts, which are already a little swollen, "Are going to turn into the hugest, most obvious fucking cow udders. You're going to moo and milk for me, and every other man you meet. You're going to have so many babies, and so much milk. It's going to be so good for you."
Then I stand up and open the door to the waiting crowd of guys. I'm going out to pick up a new slut. When I come back in a few days, I'll have a cow name all picked out for the erstwhile Isobel, and every last one of her holes will be leaking gobs of cum. The great thing is, she won't even mind. She won't complain. She'll be a happy little titty cow, just like a woman should be.