Yes

Bethany stood there for several moments, watching the demon’s cock twitching and pulsing in his ****-induced arousal. Without even thinking about it, she stepped closer and reached a hand out. Wrapping her fingers around his cock she stroked it slowly. “Well, you used me for your own pleasure,” she said as she felt her mouth-watering, “only fair that I return the favour.”

It was a poor justification but was enough for Bethany to give in to her desires. She knelt under the creature and lined its cock up with her mutated mouth. As she sucked on him, she moaned. He tasted better than she remembered, or maybe that was her own cunt.

As she dove deeper, the demon’s hips started to thrust out of instinct, and she moaned. She wanted to feel his cock stretch out her throat, see what this corruption could do. She pushed herself deeper still and reached a hand up to knead and squeeze his balls. She was not trying to be gentle but loved feeling them churn in her hands.

In the back of her mind, she knew this was disgusting, willingly sucking on a filthy demon cock, which would, in all probability, corrupt her further. But at the same time, she felt herself shuddering through a small orgasm, just from sucking his cock, and she loved it.

Her jaws stretched out, and her throat bulged. She wished she had a phone to take a picture and then had an idea.

She quickly stood up and grabbed another of the wolm before squeezing it in her hands and reciting the words the demon had earlier. A conjured mirror showed up as the wolm wriggled in discomfort, its magic being drawn from it.

Bethany discarded the creature before returning to her position with the mirror. It took her a little while to get the right position, but soon she could see the bestial cock stretching her out as she pushed herself to go deeper. Her jaw distended, and her throat bulged. It dipped behind the joint of bone between her clavicle and breast bone, and she shuddered in lust again. It pushed past her beating heart, which had not become translucent, and continued down. A solid foot of thick demonic cock stretched her out, and still, she pushed on.

As her lips came in contact with his knot, she felt him shuddering and was worried her would cum before she was ready, so she pushed hard one last time. Her jaw parted further, her skin stretching to allow the massive knot to block her entire mouth, and the tip she felt push against the entrance to her stomach. It was then that she discovered some of the other changes. Deep within her throat, the sensations changed from being pleasurable to electric. It felt similar to when she was being fucked and made her cum again, squirting onto the floor in pleasure as the demon started to spurt.

She moaned as she watched him filling her, the cum mixing with the bile in her stomach as his balls contracted to pump the corrupted semen fill her stomach.

The changes happened faster this time. The bulging of her stomach had barely begun when it started to abate as her body absorbed the magic. She watched her teeth fuse into incised plates, and more plates grew behind them—ridges of razor-sharp bone.

Her throat filled with little nodules, each firm which she guessed would provide for more pleasure of her partner. Her skin, which was not translucent, grew a soft shimmering fur that tingled as it grew.

In the back of her mind, a predatory instinct took hold, and with malice and glee, she slowly closed her jaw. The muscles barely strained as her sharp rows of teeth passed by each other like scissors as she neatly removed the cock from the beast.

He howled in discomfort but did not otherwise move as she pulled away and leant over. With a retching motion, not dissimilar to a cat with a hairball, she brought the beast's cock back up, still twitching even though it was removed from his body.

She smiled to herself, the predatory part of her brain telling her it was justice, survival of the fittest, and she was now fit.

As she crawled out from under the creature, she noticed her fur shifting colour, blending her into the surroundings. She was a hunter now, and everything else was prey.