Jennifer, your girlfriend, decided to pop around to see if you were back from your trip. She uses her key to get in, finds you sleeping and decides to rummage through your bags to see what you brought back for her. When she discovers the enormous equestrian dildo she is stunned.
Jennifer is about to turn around and wake you up with a fierce slap when the dildo suddenly springs to life in her hands. She opens her mouth to scream but the dildo manages to squirm free of her grasp and launch itself into her open mouth before she can make a sound. Jennifer grabs the dildo and tries to pull it out but it is held there by a strong magical force. Thick, pungent seed floods her mouth, and the taste makes Jennifer gag, which in turn opens Jennifer's throat, allowing the cum to flow freely down to her stomach. The cum enhances the young womans throat, causing it to open wider and wider as her gag reflex transforms into a pleasurable new muscle.
Jennifer staggers backwards as the feelings of intense pleasure overwhelm her. She bumps into your desk and instinctively drops her hands to cushion the impact. The dildo, no longer restrained, plunges down Jennifer's open throat until just the huge balls are resting on her face, stimulating all of the new nerve endings in her throat which is enough to push the woman over the edge.
Jennifer's scream of pleasure is stifled by the equastrian dildo as she undergoes the most intense orgasm of her life up to this point. She grips the edge of the desk so hard that her knuckles turn white, her whole body shaking uncontrollably, her hips thrusting wildly into the air as her pants stain with her juices. More of the demonic cum floods Jennifer's stomach and her body absorbs it instantly. She can feel herself becoming stronger while her sexuality develops like a second puberty. Her hips widen a few inches with a pleasurable pop, forcing her shorts up the crack of her swelling ass and forming a pronounced camel toe in the front. Her breasts swell from a b-cup, straining the elastic of her sports bra until it rips open, allowing her nipples to spring out from her new titflesh. Muscles lightly define themselves all over her body, taking nothing away from her feminity but making it obvious to anyone that there was a great deal of dormant strength beneath the soft, curvy flesh of this woman.
Jennifer recovers from her earth shattering orgasm as the dildo is still pumping its corruptive seed into her body. The fear of her situation returns so she uses her new strength to grab the balls and yank the two feet straight out of her throat, then tosses the spurting dildo across the room and starts to run, but the weight and foreign feeling of her huge, bouncing tits causes Jennifer to lose her balance and fall to the ground.