Mrs Tinson's screams increased in volume, distracting Susan from her peaking pleasure. The herm pounding her from behind slowed down, and together they watched as Jenny's balls pumped a gallon of spunk inside the once middle-aged divorcee. The woman shook violently, and only the whites of her eyes were visible until she passed out.
Jenny tossed the limp woman back into the small pool of jizzcream that remained in the sensory deprivation chamber. Susan expected to see thick clumps of jizz ooze from her snatch but to her shock the stretched pussy lips squeezed themselves together. As Jenny shut the lid, the woman stirred and rubbed her clit.
Susan kicked her legs to encourage her stud to continue. The herm responded and the room filled with the sloppy claps of their thighs hitting together. Ripples of pleasure rolled through her body with every thrust. It was like having a series of mini orgasms. No human had given her even that much pleasure. She was glad her cunt was too stretched and ruined for them now.
A warm shower sprayed across her face. She blinked away the drops that caught her eyes and noticed Jenny lying on the closed tank, legs spread wide with the dark lips of her mare cunt winking at her. Another gush of pussy juice sprayed forth and she held out her tongue to taste some of the sweet nectar. She felt like a depraved, nasty slut and loved it.
Her nipples, already hard, felt like they were getting even fuller. She felt a similar sensation further down. All four spots on her body ached to be suckled on. The upper two dribbled as they bounced around. The lower two jiggled more with every thrust. It felt both wrong and right.
The slutmare roared and slammed her cock in right up to the base. Susan felt the hot cum flood her insides like an erupting volcano. For the insides of her tranformed cunt, it was like being given a thousand licks on her clit. The explosion of pleasure sent her into convulsions. Drool escaped from her mouth as her world went blank.
When she woke, she was on the floor. Her tits, all four of them, pressed into the sticky pool on the floor. Her first thought was not to allow any cum to escape and her hand whipped to her snatch. Her lips, thicker than she remembered, were pursed close.
She pushed herself up. The slutmares were gone, presumably off to grab refreshments after every drop of jizz was drained from their bodies. Susan couldn't help but feel proud at the accomplishment and her tail swished with joy.
Wait, her tail? She twisted and glanced over her shoulder. There it was, flicking back and forth, proof that she was a broodmare. No wonder her pussy had sealed itself tight. New instincts were ensuring she got pregnant. She thought of the way Mrs Tinson's snatch had sealed as well and wondered if she was changed too.
She opened the chamber. A grinning, four breasted woman gazed up at her.
'What do you think my friends will think of me now?' she joked. They both laughed.