Yes

His fellow detective breaks from the trance she had been in and stumbles to the door and out of the room, after a bit of trouble turning the knob. The former cop could certainly stop her, but why gobble all the candy at once?

“Oh, you're no fun,” Halloran says. “More for me, though.” She pulls him toward her with his belt and sets to work freeing her prize from its cloth prison. Liberated, it rises eight thick inches, a nice human specimen but nothing like a demon fuckstick. Still, she slurps the black meat into her infernal mouth and quickly has Larry on the precipice. Knowing one more push will send him past the point of no return, she pokes the time of her tail into his sphincter and then up his asshole.

“Ah, shit!” Larry says, and then he's on Halloran, thrusting his cock into her needy pussy, his face sandwiched between her mammoth crimson tits. Her cunt feels like heaven, and as worked up as he is, he should have cum the second he felt her hot juices bathing his meat. But instead he pounds away, wanting to fill the demon up, needing to fill her up. If only his cock were as big as the strange demon's, he could give her a real good time.

Almost imperceptibly his cock swells as he fucks Halloran with abandon. His paunch recedes and his chest swells, straining against his shirt in the suit jacket, until the shirt splits at the seams. Larry claws the rest of his clothes off, his chest taking on an azure hue as his hair fades to white. Gold flecks dance in his irises and his canines grow into fearsome fangs. He suckles at Halloran's tit, running his rough, forked black tongue over the pitch nipple.

“I love this cock! Fuck! Yes! Fucking fill me, stud!” the female demon says, once again close to the orgasm that she narrowly missed before. Her tail cock picks up its own pace, taking Larry's ass, as his budding tail wags above it.

Larry feels so close and knows how to crash over the edge. Why did he ever care about anything else? Everything else is moot in the face of such overwhelming pleasure, including his inconsequential soul. Shrugging it aside he feels electric. Such power!

His cock rolls into her like a thunderclap, and she howls, throwing her own soul after his. He shoots rope after rope of black cum into her, both faithful soldiers of Lilith's army at last and ready for another fight.