A passerby, a neighbor by the name of Valerie, heard a series of loud thuds and something of a scream coming from Mary's house. And after seeing that the front door was left open a crack, assumed the worst.
Valerie wasted no time in entering the house, and calling out to whoever was there. But the only sounds she could hear were more thuds, and squealing. Not screaming, squealing. Like someone stepped on a squeaky toy. She knew Mary didn't have any pets, so an animal couldn't be responsible for the noise. Could it?
Valerie began to climb the staircase, to the upstairs bedroom where the sounds were coming from. As she did, her nose picked up the scent of something... musty. Sweaty and barnyard like. Which only peaked her curiosity more.
Meanwhile, inside Mary's bedroom, the two pig creatures were enjoying each other's company in the most vulgar ways possible.
The bed was soaked in all sorts of bodily fluids. A mixture of milk and cum has wet the sheets, and is now soaked into the mattress itself. Both Mary and Kevin's large balls provide their shafts with plenty of spunk. The two had been having sex nonstop for at least fifteen minutes, and they hadn't even gone through half of what was churning in their sacks.
Mary was on all fours again, in a complete animalistic position. Her ass flung into the air, and her face bent down to lick her own cock. Kevin is busy eating her out, enjoying his more sensitive taste buds and elongated nose. He's able to bury a good inch of it inside Mary's large cunt. When he snorts, Mary's body shakes with pleasure. Her vagina clenches and unclenches around Kevin's nose. The air tickles her insides in ways she never thought possible.
"Do it, don't stop!" Mary squealed. Kevin pulled his snout of Mary's snatch, and once more slides his penis inside.
Valerie stands outside the door, listening to the obscene sounds. She can't seem to tear herself away. It's disgusting, and yet at the same time extremely enticing. Her own pussy is slick with fluid, and her hand drifts down to touch herself. Her skirt is short enough that she can simply slide her own hand up, pull her underwear down a bit, and start rubbing her soaping hole.
"Oh..." she moaned. Valerie leans against the wall, touching herself to the sounds of Mary and Kevin's bestial fucking. As the two cum inside, Valerie's other hand reaches up to fondle her breast. But on the way up, it grazes against a bit of cum left in the hallway from when Mary and Kevin moved from the living room to the bedroom to continue their sex.
"Huh?" Valerie temporarily stops pleasuring herself to inspect the white stuff on her hand. Suddenly, it's absorbed into her skin. And then a heat rushes through her body.
"Oh my GOD!" she screamed as her body began to expand, and grow coarse hairs.