Jen wasted no time at getting started, to Jenny's surprise Jen was up and ready to go after all that sexing.
Jen's sex driven mentality was immensely excited to experience this new transformation, her nipple dicks were already hard and her testicle breasts were quickly filling with newly hot and sticky cum. Holding each of her churning breasts Jen finally moaned, "Susan, fuck me..." as she continued caressing her breasts and hungry cocks, "I want to enjoy myself..." as she looked at a slightly frightened Jenny.
Jenny couldn't believe what was about to happen to her, her body was trembling. Jenny thought at first that she could run but as soon as Jen's commanding eyes came in contact with hers, it was almost as though she felt it was an obligation to get on all fours and present herself to Jen.
Jen, seeing this, was elated and excitedly trotted over to positing her zebra pelvis over her sister's back end. With Susan positioning her head at the lips of Jen's soaking hot pussy, Jen proceeded to dry hump her sister.
At first it was an odd sensation, the underbelly of a zebra body grinding against Jenny's ass but then all of the sudden tendrils exploded out of the zebra groin and plunged deeply into Jenny's anus and pussy without mercy. Jenny let out a deep gasp, the shock and initial pain was almost too much but then the pleasure started to set in - as if it was two cocks penetrating her. For Jen the sensation was strange, but phenomenal! It only encouraged the the carnal humping and sexing - along with Susan's rhythmic thrusting, Jen was going to explode soon from all that pleasure.
The stallion zebra, being sidelined, seemed confused by what was happening but was still extremely horny. It must have sensed something from all of this because it walked up next to Jen only to present Jenny with something to play with, for the last time on her own...
Jenny saw the hot and heavy zebra cock dangling next to her, the smell and pheromones from it seemed to have a catastrophic effect on her as she found herself irresistibly grabbing and sucking it as much as she could.
The transformation continued curling up Jenny's legs into large cum-filled zebra testicles, and the black warm texture worked its way up her body. Jenny could feel that she was shrinking since the other cock was getting larger and larger in her mouth - strangely enough she was still able to fit her lips around it - but instead, resorted to licking it lovingly.
Jen's eyes were rolling into the back of her head as Susan began to explode into an orgasm and Jen's pussy was almost in a way kissing and sucking the cum out of her; All the while her sister was transforming into her new proud zebra cock! Her hind legs could barely avoid buckling.
By now Jenny was drunk with sex - being connected to Jen's mentality and becoming a cock had compounded her already intense sex cravings. She had finally successfully managed to get the companion cock she was sucking and licking to explode and she quickly pressed her lips around the cock head to capture every ounce of that delicious cum the stallion cock was spraying into her, after all this was the last time she as a girl would be sucking a cock.
The warm cum flooded her mouth as it sprayed, she began gulping it down but at the same time the transformation had worked its way up her torso and had made it just under her breasts. She was hanging high above the air and was very stiff. The warm cum she had swallowed seemed to have been recycled and integrated with her because her lips and nose began to drool her very own cum. The stallions cum rushing through her seemed to have wiped most of her memories and thoughts and replaced it with dominating thoughts of sex. Jenny realized she would have to pass urine and even mate with other mare zebras, but that didn't seem to mind her, in fact her new thoughts excited her.
Giving the stallion's cock one last kiss, Jenny's arms, breasts, and head began to mold into its final form. Her eyes closed, her hair fell out, and any sensations of smell and sound dissipated forever to be replaced with intensely sensitive skin and with one final *fwomp!* her head popped into form with her lips closing in to fulfill the complementing features. With that, a new *male* cum drooling Jenny has a new life to look forward to.
When Jen had finally managed to overcome her erotic thoughts, she looked down at her new sister (brother?) with pride. Jenny was hard, and starving for sex - so was Jen. Looking around the empty stall the only Zebra inside today was the stallion, but Jen's sex-driven mind didn't let that stop her...