"Jen, what are you...oohhhh!!!" Susan cried out as an incredible wave of sexual energy pulsed through her body. The changes began without delay, Susan buckled over and grabbed her head. At first there was a fierce headache, Susan's hands began shaking at the thought of what was about to happen. All of the sudden the aching pain turned into thoughts of pure carnal pleasure. Susan's body quickly became hot and sensitive, her pussy throbbing with all these flooding thoughts. Susan was unable to suppress her moaning by then.
Without warning Susan's head and neck exploded into a mass of changing flesh, the last vestiges of sight and sound disappeared from Susan's senses as her new "head" began forming and molding into its proper shape. Hair began receding into her scalp and the bones and tissue on her face began to soften and grow extremely sensitive. The rest of the "neck" turned a long dark black shaft giving off a moist slick reflection from the light. Jen who was thoroughly fascinated by the whole transformation became gradually more and more aroused from the thought of fucking that cock, her pussy was soaking wet and craving sex.
By now the new Zebra cock grew over two feet in length and was getting thicker, pulsing with a smell that Jen found intoxicating. A fluid was dribbling from the new cock as Susan unbuttoned her shirt and began rubbing one hand over her breast and using the other to touch and caress her new 'head'.
Unable to resist the overwhelming smells Jen trotted over and delicately grabbed the throbbing shaft. She brought the cock head to her lips began to lightly kiss the tip of Susan's zebra cock head. A jolt of energy and excitement caused the cock to become even stiffer and throb in Jen's hand briefly surprising Jen before she became more excited. Susan, overwhelmed by the sensation, only pressed forward to Jen's lips again, the drive to please Jen began to dictate all of Susan's logic. She felt the need to fuck, please, and serve Jen whenever possible.
By now Jen had wrapped her lips around the head of the cock, licking, kissing, and sucking the pulsing head. She used her hands to rub and pump up and down the slick black shaft. "God it tastes so good!" thought Jen to herself as she closed her eyes and gave the head another wet kiss.
Susan who had become overwhelmed with pleasure didn't feel the two lumps growing at the base of her cock head. The lumps started filling out and getting larger. Susan kept playing with her nipples as the new pair zebra testicles slid down her chest resting gently over her pair of breasts.
Jen was now giving Susan a full blown blow job, her eyes closed and in the moment focused only on sex. Susan, on her knees, suddenly jolted as her balls gave a rippling spasm and Jen soon tasted a jet blast of hot cum in her mouth. Despite swallowing as much as she could, Jen's mouth couldn't bare to take on more and the cock head popped out spraying it's load all over Jen's face, neck, and chest. Jen loved being showered on in cum.
By now Susan was vigorously rubbing her testicles feeling the electrifying pleasure that came from it. The transformation had completed and shakily Susan stood up from her knees...