Melanie was in shock. She had just witnessed her mother and brother turn into a bull and cow. She watched as her mother, now ready for round two, mounted her brother a second time, mooing in sheer ecstasy.
"Come on Mel. Let's go inside." Alice could only pull her friend away from the display unfolding around the pool.
"Hey Mel, I'm going to call my mom's friend down the street. I don't know what's going on, but we're going to need some help if we're going to get your mom and brother back"
"Yeah, yeah sure Alice. I think I just need some alone time for a bit."
Alice hugged Melanie before she left. "It'll be alright, we'll get through this and get your mom and bro back."
Alice watched Melanie walk off and made her call. As she began her call, she could hear Melanie running water in the upstairs bathroom. While she was vague in describing the nature of what had occurred, her mother's friend agreed to come right away to help. As she finished her call, she noticed Melanie return downstairs.
"Feel a bit better Mel?"
"A bit. Is your friend coming over?"
"Yeah, she'll be here in a bit."
The two continued to make small chat as they waited. As time went by, Melanie began sniffing slightly at an odd scent in the air, forgetting for a second about her mother and brother. A steady warmth began to build in her nether regions.
"Her Alice. I just wanted to say thank you for being here for me. I don't know how I could handle all of this myself." Melanie went to give Alice a hug.
"No problem Mel." Alice sadly smiled as she returned her friend's embrace. They stood there for a while before Alice realized something was wrong.
As the embrace continued, Alice began to feel a poking feeling around her crotch area. Slowly she felt the poking grow, increasing in intensity. Given the growing discomfort, Alice pushed away from her friend and witnessed the zoo's new victim.
Melanie stood, head down, staring intensely at the growing bulge tenting out her yoga pants. She lifter her head, eyes full of panic and mouthed "I don't want to be a bull too."
Melanie's admission urged the changes onward. She rocked her head back and thrust out her crotch. The new penis was now proudly on display, fully tenting out Melanie's stretchy yoga pants. Popping sounds could be heard as bull testicles deposited into Melanie's pants, showing clearly through the tight material. A low groan could be heard from Melanie's mouth as her new balls began producing seed for her new equipment. The next changes then began.
Alice tried to rush to help her friend, not wanting to lose someone else to the changes. She had only taken a few steps before Melanie groaned again and experienced her first male ejaculation. Cum sprang from Melanie's new shaft as she came hard through her yoga pants onto the surrounding furniture. As her first orgasm faded, some clarity returned to Melanie's mind.
"Oh my. I'm so sorry Alice. I couldn't fight it. It's too strong. Please, get away from here! I don't want you to fall victim to these changes as well"
"No way Mel! You have to fight it! Maybe you can push back the changes."
Melanie gave a sad smile to Alice. "I would if I could. I'm sorry Alice. Please go."
With that, Melanie's eyes went wide as she thrust forward and ejaculated hard all over the area in front of her. Melanie began grinding relentlessly against the fabric holding her penis back. It wasn't long before she had been driven to another orgasm, and then another. Alice could only watch in awe as Melanie's penis and balls began growing again.
A ripping sound rang through the air as Melanie's pants were finally tented to their limit and tore open, expelling cum all over the room. Alice watched in shock as a bull penis and testicles emerged from where her friend's vagina had been.
Melanie, now completely a slave to her lust, wrapped a hand around the bull shaft and began pumping. These motions stoked more orgasms as well as new changes. Horns began growing from Melanie's head and her face pushed out, becoming that of a virile bull. Similar to her mother, the breasts on Melanie's chests began spurting milk and deflating in the process. Before long, Alice was watching her friend, now with the face and musculature of a bull, pumping her new cock and spraying seed all over the surrounding house.
Alice jumped as a loud moo escaped her friend's mouth. A tail had erupted through the back of Melanie's yoga pants and provoked another orgasm. Fur began growing around Melanie's penis and balls, spreading all over her body. Melanie then began snorting in frustration, as her hands formed into hooves, now not able to stroke herself to orgasm.
Alice could only watch as her friend stormed through the open door back to the poolside. She pushed past her mother, who had, by now, fully sated her lust, right towards her brother. Without slowing down, Melanie mounted her brother and shoved into his vagina. She began thrusting madly, pushing towards the last of her changes. With one final thrust, Melanie came with all her force into her brother. Alice watched as Melanie detached herself from her brother, penis now limp and dripping cum all over the surrounding pool area.
Alice then heard a noise out in Melanie's front yard. She looked out the window to see a new visitor.