Kelly, as promised, stayed with her older sister Veronica until their parents returned. She only left to go into the house and get lemonade for the both of them, after which she had to help her sister drink, because her sister couldn’t move her arms which were now branches.
During the wordless hours of waiting, Kelly practiced walking with her new horse body, jumping and trotting naturally after the first few hours. Veronica had cried during the first few hours before falling into a sort of trance as the day wore on, seemingly focused on absorbing sunlight. Not wanting to leave her sister, Kelly loitered around the tree that had become one with her sister. Now that Veronica wasn’t awake, Kelly observed her older sister with fascination, with strange passion. Her eyes soaked in Veronica’s curves, from head to thighs.
Kelly’s eyes lingered on Veronica’s bountiful breasts with beastful attraction. Her sister was hot, and the fusion had left all her tasteful parts on display. Kelly felt an unfamiliar pressure in her lower horse groin and realized that her horsecock had grown erect and emerged from its sheath, hard and erect. She was turned on and horny from ogling her sister’s tits! Kelly felt dirty, yet something in the back of her mind said it was natural. Kelly tried to tear her eyes away from her immobile naked sister, but she found herself to eventually go back to staring at Veronica’s green jugs. The throbbing pulse of her horse dick was not helping, urging her to get off or breed something, it was driving Kelly mad.
Unable to bear it any more, Kelly tried to turn her upper body and reach down to jerk off her dick, but she was too high up with arms too short. Frustrated, Kelly tried tensing her lower muscles to maturate the way horses do, by banging her cock against her equine stomach. She succeeded in making her dick slap and flop lewdly, but the pleasure was brief and teasing. With overwhelming hormones clouding her mind, Kelly could only think of one thing, she needed to get off now.
Animalistically, Kelly, like centaurs in Greek myths, prepared to fuck, “grape” , her tree sister. Rearing up, the centaur girl rested her fore legs on her older sister’s branches and started titfucking her sister’s bouncing green boobs. The immense length of the horsecock allowed Kelly’s tip to smack and slap Veronica’s lips and face while also boobfucking her jiggling melons. This of course, woke the tree girl who started screaming and sputtering, as she couldn’t do anything about her assault. This made the centaur harder and the violent thrusting increased in speed and ferocity. Soon Kelly came all over Veronica’s face, covering her sister in runny white horse goo. The liquid flowed down Veronica’s face, to her breast, to her stomach, down to her roots.