Xan’s concoction trickled down Coal’s throat. The rapidly altering demoness found it thick, rich, pleasant tasting. It dulled the pain, if only for a moment, though something tasted very odd about it (or at least, should have been odd)…it took her a moment to place it…
“XAN!! I’M GONNA…KILL YOU…!!!”
The diminutive demon smirked, leaning against the counter. “And whatta way to go!” he chuckled, idly tossing a beaker in the air. His small prick jutted out toward the succubus, a bead of demon cum lingering at the tip as incriminating evidence of Xan’s addition to the formula.
Coal struggled to get to his feet, weighted down by the now fully developed black leather wings protruding from her shoulders. “Xan…what…did you…” The words were cut short by the agony of her pointing and extending ears. She hissed, deploying her lengthening, forked tongue and bearing growing canine teeth.
“Heh, sorry, Master…er, Mistress. Just couldn’t resist,” Xan grinned weakly. “But hey,” he grabbed his erect three inches, waving it temptingly before the demoness, “far be it from me to not offer a starving demoness the cure for what ails ‘em.”
Coal’s agony ceased the moment his glowing crimson eyes settled on Xan’s prick, and the luscious drip of semen at its apex. The succubus licked her lips in eager anticipation, fighting an inner battle to retain the last shred of masculinity remaining.
Xan was absolutely no help, idly stroking himself while putting on a mock striptease before the cum-hungry succubus. “Hey, boss, ever find it odd they’re called ‘Suck-U-By?’ Kinda like truth-in-advertising, y’know?”
Newly developed claws dented the tile floor as the succubus began crawling on hands and knees toward her delicious reward. Nipples almost an inch long scraped the floor, aided by the further expansion of her buoyant breasts. Her bare pussy ached, working like a mouth trying to suck anything inside it. Her own tail, now longer and capped with a phallic head, answered, and she moaned at the self-penetration.
Xan giggled, and was about to make another of his stupid jokes at Coal’s expense, when he was cut off by the lips of his Mistress sucking his penis inside her mouth.