Intercourse between human symbiote and female human

Carlton Drake suddenly removes all his clothes and lab coat, leaving himself naked, showing off his muscular body. The other scientists leave the room and monitor the lab by utilizing surveillance cameras.

Carlton makes a growl and greyish slime forms on his skin, his body becoming more muscular by the moment, before turning into a monstrous figure, with a maw that can easily swallow a human and claws that can tear apart virtually anything. He looms over the redhead on the floor.

"And now, we are going to experiment on what will happen when a male symbiote has sex with a female human." Riot says. "Any questions?"

"No..." Mary Jane replies, her hand touching on Riot's skin lightly. She thought that his skin would be rough, but in fact, it is slightly slimy instead. The red veins on the symbiote suit pulses with life. "Come on, let's do it."

She embraces the monstrous man, her legs entwined between him. Riot undestimated her willingness. He then pulls out his cock and plunges into her dripping snatch quickly. They both start to moan in pleasure.

His tongue lashes out and wraps around her left breast, drawing a gasp of surprise from the young woman. It coils around her deliciously soft tit, working it with surprising agility as it tugs and twists her soft breast. The tip of it works across her nipple as thick layers of slime-like drool coats her chest. Mary Jane moans in nirvana; her husband has never done something like this before. She feels hot and filled with lust never before, she has never experienced such pleasure.

Riot continues to thrust in and out of the redhead's womanhood, her hole gripping on his grey shaft tightly. Her cunt is perfect, smooth, and clean with tight looking lips that promised immense pleasure to anyone let past those heavenly gates.

"You...are so good." Riot grunts as he keeps on fucking the woman, his hands holding tightly on Mary Jane's tight ass and back, his tongue swirling around her breasts. And with a sudden, the female holds his head with her hands, and kiss his maw sweetly, her tongue licking on his sharp fangs, her mouth sucking on his serpentine tongue. The man returns the favour and the two french-kiss like a pair of lover.

"Fuck..." Mary Jane moans in pleasure, her legs unconsciously wrapping around the hulking alien's waist as he viciously fucks her. His massive balls slaps against her ass as he thrust, turning those perfect asscheeks cherry red with each impact. The echoing crack of his churning balls slapping against her cushy cheeks adds another layer to the lewd chorus accompanying the redhead supermodel getting her brains fucked out.

Her large breasts press against Riot's heavily muscled chest, she never wants it to stop. She is enjoying every moment of it. Mary Jane screams in pleasure, begging for more, like a total slut. Her words can even make the sluttiest prostitutes blush.

He gives one last thrust, burying his cock deep into her cunt and letting loose. His balls clenches and sends a gushing explosion of jizz into her, bloating her stomach and soon overflows her cunt in a shower of thick alien cum, before slowly drooling out from the hole. Mary Jane Watson lies down on the floor, exhausted and totally satisfied from the experience, before kissing the man next to her again.

"Well, it seems like the experiment is successful." Carlton Drake says, the symbiote retracted and revealing his face. "And I do enjoy the sex, you are truly amazing."

"Thank you for praising me. I have never enjoyed something like this before." Mary Jane replies.