Her pussy.

Scooping up some of her juices with your thumb, the demon jams your cock balls deep into her sopping wet pussy with a single stroke. Melissa's gasp is silenced when the juice-laden thumb enters her mouth. She sucks on it sweetly as your hips rock slowly back and forth inside her. "That's a good girl," your voice says, while your fingers caress her cheek. "Do you like it when I fuck you nice and slow like this?"

Melissa answers by nodding her head, and rolling her tongue around your thumb, and squeezing her pussy walls around your cock.

The demon pulls your thumb out of her mouth and cups her shoulders from behind, bringing you chest to chest with each other. "Then you're going to love this." the demon says, pulling her down further onto your cock before hammering into her as hard and fast as your hips could go. Melissa bites down on your shoulder, either to not scream or in protest, to get you to slow down, but instead your body begins to speed up.

Faster and faster and faster, your hips pump into hers so fast that they begin to blur in and out of sight. "F-f-f-f-f-f-f-f-f-f-f-f-..." is all she manages to get out, as the demon uses her pussy like a boxer uses a speedbag. "...FUCK-K-K-K-K-K!!!!" She howls as her orgasm hits her hard, but your hips still fuck her through it. Desperately, Melissa wraps her arms and legs around you, trying to get you to stop, which the demon does after one more hard thrust.

But she still gets no rest. The demon makes your cock lengthen and shorten inside her, pumping into her even though your body has stopped moving. You can feel more mouths, tongues and hands sprout out of your front, out of Melissa's sight. They nip, lick, suck, grope, pinch, and paw at every inch of her skin they can reach, driving her crazy. "You're still fucking me," she gasps in your ear. "I haven't stopped cumming. Stop, please! I can't take anymore! It's too much! I don't want to cum anymore! Please! No more!"

Tears start flowing out of her eyes as she cries out. You see the demon's face emerge from yours and he licks up her tears with his long tongue. With a cruel smile, he returns your cock to it's normal length, but then makes it swell up to fill her completely and vibrates it violently. Melissa's eyes roll back into her head and she goes hoarse, screaming loudly as this second orgasm takes over her.

You feel the demon leave my body, returning your body to normal and surrendering it's control back to you. You are suddenly overwhelmed by absolute pleasure. You're going to cum and cum hard.