"Why don't you let us help with that sweetie?" Mary asked, once Megan had finished blowing chunks all over the living room floor. Megan let go of her cock, and half ran over to where her mother and sister were lying. She didn't think twice to lower her head onto Jen's eager cock, nor to wrap her hand around her mother's ass, slipping two fingers into the black donut between her cheeks. Both started to moan obscenely, and grab themselves. All lost in passion, not caring how wrong the whole situation was, or how disturbing their thoughts were.
Jen began pushing more and more of her horsecock into Megan's mouth, until a good eight inches was inside. Megan's own cock had become erect again, and was pointed straight at Jen's opening. Megan shifted, and soon plunged it into her sister. Jen whinnied and bucked her hips backward. Mary took the opportunity to take her own prick and ram it into Jen's asshole. Jen shuddered again, being penetrated from both sides.
She lay there while her sister and mother worked her over. Jen's penis still inside Megan's mouth, was simultaneously being stimulated while Megan pumped her penis further and further into Jen's horse pussy. She tried to cry out for more, but her mother shoved one of her breasts into her mouth. Mary released a whinny of her own as Jen started sucking.
Outside, Kyle stood on Jen's front lawn listening to what was going on inside. He too had become hard, and wanted to join the three inside. But he held off, busy admiring what he had caused. Knowing no one would care, since the majority of the town had become infected at this point, he slipped a hand to his own "horsecock". It wasn't an actual animal phallus like the girls', but for a human it was enormous. Ten inches soft, almost twice that size when erect. And right now, it was as erect as it could be.
The three reached orgasms one at a time, seemingly causing the others'. Megan came first inside Jen, then Jen into Megan. And then Mary last. They were all leaking cum, thick drops pattering on the floor. Hearing the three women reach their climax, Kyle released his own normal load onto their front lawn. He snickered to himself, seeing that they waste no time in starting again. He slide his penis back into his shorts, and zipped his pants.
"Good luck Jen, you're gonna need it." he murmured. Kyle walked away from the house, just as Brian, Mary's husband, Jen and Megan's father, came home.