You've practically accepted already

The notion of his offer is so alien that you can't wrap your head around the full implications of it. There's a catch, you know there has to be... but if Bulgarmet can create an identical proxy to pay whatever toll he desires, you'd be a fool not to accept.

Riding him to orgasm is a problem. Well, if you're going to be honest with yourself, it's stopping once you've started that would really be the challenge. What's the point of letting him copy you if your will crumples along the way? And what's to stop him from trying to baste your insides with his baby-batter? You don't think you could stop him, and you're not sure you could stop yourself - even now, you're tempted to scoop his semen off your skin and smear it all around inside your tender flesh with your own fingers.

It's been some time since you've worn a daemon-mark on your belly. Maybe too long... And Bulgarmet's spawn isn't so hard to birth...

More fantasies crossing the boundary between imagination and true memory. Nothing like this could have happened before, or else you'd already know what you're getting yourself into. Still, to worship his cocks along with your harem sisters with a belly heavy with his offspring, wrapped in the silk clothing of his ****-girls, and fucking the beast for the rest of your existence with nary a care in the world...

No, you'll stop it before it comes to that.

"I... yes, but..." His member twists and trembles beneath you, threatening to slip upward and fill your hot little hole at any moment. You want it to catch on the edge of your flesh and pop inside, dragging you over the edge against your will. You may be the one holding yourself back, but the anticipation is driving you wild.

Bulgarmet's pudgy fingers are roaming over you now, squeezing your breasts and thighs, the tip of a finger poking into your anus. "But what, my dear? No conditions, and don't even think about reducing the terms..." His tongue is licking frantically around his lips, strings of drool flick off of it and mix with the seed coating your body.

You can't hold back a lusty groan as you squeeze your legs around the dick wedged in your groove. "N, no conditions... ahhh... Just, let me watch. Mmm... I, um... want to see myself..." You blush, and shudder with pleasure at your confessed perversion.

"Hahaha! I'd have prepared a mirror for you if I'd known! But watch all you want! Or fuck her along with me! Now, we're in agreement." It isn't a question. You've no mind argue. You can't take anymore of your own teasing.

Finally, you raise your hips just enough for the head of his dick to angle upwards. With a mind of its own, the thing spears into you, suddenly rigid despite being soft and springy before. It expands to fill your tight little twat all the way to your cervix, where the head of it feels like it twists into a knot before drilling right through into your womb. Nearly as quickly, the malleable mass of fuck flesh inflates, stretching you open even wider.

In only a handful of seconds, you find yourself nearly impaled on his spear... "Ooohhahmmmmggh.." The moan rises up in you, prompted by the intensity of his filling your insides with his meat, but your voice is expelled forcefully at it stuffs you overfull, until you finally **** on the sound. It doesn't do the sensation justice - anyone who hadn't experienced Bulgarmet filling them with one of his dicks couldn't possibly understand that the vaguely distressed noise belies a moment of almost perfect bliss. Your body ragdolls and you fall forward onto the massive bulk of daemon flesh that passes for your mate.

"I love your responses! You're a natural-born slut, Sabine, your body know the steps before you do!" You can't help it. His cock is perfectly molded to your insides, it stretches you just right... you wouldn't be able to resist him even without his venom soaking through your skin.

Your hips move on their own, grinding against him. You'd bounce against his shaft, but it contracts and expands on its own, sending pulsating ripples up and down the length of it. "Can't... oooohh, help it... it's soo goood..." The tone of your voice isn't unlike his adoring slaves, but it isn't an affectation anymore. Your words aren't flattery - you've never been so honest. "Love, mmm... your cock... it's big, mmm, perfect... ahh!"

The pleasure of his fucking has overloaded your reason. You kiss and lick at his grimy skin, running your fingers over his fat bulges to delight in his flesh. When the daemon leans over to stuff his tongue down your throat, you suck on the thick muscle, inviting him to befoul your mouth.

One of his harem girls slides nearby you and whispers into your ear, "Please let the master mark you! We could have such fun together... he'll even give you a twin sister!" She giggles and bites your ear... It would be a small price to pay to continue enjoying your sinful lovemaking.

"More... more..." Your body bounces, but only from the **** of him pumping inside you. You're trying to squeeze yourself against him as tightly as possible, holding on and holding out as long as possible. Bursts of sensation originate in the center of your body and explode outward, wracking your body with wave after wave of pleasure too intense to stave off your climax any longer. "Cumming... oh, Bulgarmet... fuck me more! Don't stop! Fill me more... more... Cummming!" The orgasm triggers micro novas behind your eyes - you spasm uncontrollably, losing control of your body and your consciousness alike. In the midst of it all, you get a vague impression of vertigo - you're falling, or maybe sinking, even as more of the hideous daemon's flesh rises up around you. There's a dreadful warmth around your legs and it rises up your body, like you're being swallowed feet first, but your world turns black before you can make sense of the situation...