Seeing her son transform into a full demon sent Amy into a rut. Sensing its onset and knowing that Equus could not be disturbed at this crucial hour, she slipped from the barn and headed to one of the nearby stables.
She barely made it through the door before she collapsed to the floor in a frantic fisting of her steaming cunt. Her musk filled the air like a fog, sending every tainted horse and demonic stable hand into a frenzy. Whinnies chorused and gallons of horse cum spilled across the floor, and then, with cocks still rigid, they all drew closer to the source of the lusty scent.
'FILL MEEEEEE!!!' screeched Amy. She pulled her fist from her winking, black cunt and convulsed as a thick fluid sprayed from her equine gash. It coated one of the stable hands and he roared as the concentrated demonic taint soaked into his body. His equine phallus swelled and grew further as muscles packed on top of muscles all over his half-human frame, and his balls ballooned with churning seed.
The new breeder demon swiftly lifted Amy onto his enormous shaft and the slut whinnied with pride as her cunt swallowed all three feet of horsey dick. Another stable hand approached from behind and shoved his comparatively small two footer up her eager asshole.
'YESSSSS!!!' she screamed, but it still wasn't enough for the greed that consumed her entire being. She wrapped her arms around the breeder and jerked back, dragging the three of them to the floor. One of the stallions moved in and she threw her head back with open mouth to swallow the horsey dick down.
From that point on there were always three flared cocks inside her body, pumping every ounce of jizz they had into the black hole of her soul. She was nothing but a cum dumpster for the rutting beasts and she loved the depravity of it all. There was nothing left of her humanity thanks to the final stage of corruption of her son and at long last, since the moment of her first tainting, she felt complete.