"Um, who is it?" Mike called out from inside his apartment.
"Uh..." Rachael started, loosing her nerve for a moment. "It's Rachael."
There was a short pause followed by the sounds of movement while Mike replied. "Rachael?! I didn't think you were coming back! I tried calling you but I think your phone was dead." A completely human Mike opened the door. He was wearing a bath towel around his waist but other than that appeared to be completely naked. He also seemed to be taller and more muscular than he used to be.
Rachael gasped as she took in Mike's new stature. Maybe it was all the training he had done for the fights but she was beginning to think it had more to do with that sports drink. "Holy shit Mike, you've gotten..." She blushed a little seeing the outline of his manhood against the towel. "...Bigger. What happened?"
"Haha, well, that's kind of a funny story." Mike replied. "Why don't you come in and I'll try to explain."
Rachael took stock of the apartment as she walked inside. It was a mess, from furniture in the main room being knocked over or broken to the sight of shredded clothing littering the ground. There was also a faint musky smell lingering in the air.
"It's gonna sound crazy but I'm just going to say it." Mike began. "It all started right before you got home. I started turning into a horse."
"Before?" Rachael interjected. "I didn't think you started changing until we were in the bedroom."
"No, it was almost as soon as I drank that weird sports drink. My body started bulking up and my dick got bigger too." Mike continued. "That's when I started to get really horny. Like, more worked up than I've ever been before. I was in a wierd kind of daze when you did get home and we started getting busy. I guess that's also when my fur grew in and my face pushed out cause you freaked out and ran away. Needless to say I was still extremely hard and needed to get off. So I..." Mike blushed. "I just finished myself off. It was so intense! The best feeling I've ever had!"
"Wow!" Rachael said with a hint of jealousy, thinking about how hard it had been for her to find satisfaction after her own change.
"Yeah," Mike said. "It was so good that I just passed out after. When I woke up I was back to normal. No fur, no hooves, nothing, just regular old me. The only thing was that, I still had a hard on. I tried taking a cold shower, working out, even reading a book. None of it worked, so I gave in. When I started, everything was normal, but as I got more into it I realized I was stroking further and further. My dick was growing and it didn't stop until it was the same size it was last night. Then everything else started changing. my feet changed back into hooves and fur grew up my legs. My shoulders broadened and my muscles started growing. Fur covered my whole body, just like last night. My hair grew out into more of a mane. Two of my fingers also merged into the other two. Eventually, my face pushed out, and my ears got pointy again and I was a horse man again."
"Holy shit!" Rachael stammered as she realized the potential implications of Mike's story. "And you didn't have anymore of that weird sports drink?" If what he was saying was true then she might also start transforming if she were to get turned on. She took a seat on the couch so she wouldn't fall over from shock.
"Nope, the bottle's empty anyway." Mike replied. "So yeah, I finished up that second time, but that time I didn't turn back right away. I'm not sure how long it was because I was just laying there, reveling in my bliss. Eventually I did turn back though, and I was STILL hard. I didn't think that was possible, but there I was. I did the whole thing again, worked myself up, changed and finished. I think I did that four or five times total before I finally stayed soft. After each time I changed back, I noticed that I kept more and more muscle mass and got a little more toned. You knocked on the door about forty-five minutes after I finished the last time. Oh! also be careful, I think I've cleaned up most of my messes but, there was a lot. I might have missed some."
"Oh, fantastic..." Rachael said sarcastically. She looked around her seat for any cum spatter. When she turned to look behind her, her hand landed on a moist spot. "Ewww!" She exclaimed and brought her hand around to examine. A strong salty smell wafted into her nostrils and immediately sent a powerful shiver down her body. Rachael squirmed in her seat as a heat started building in her loins. "Ugh, I'll be right back, I'm going to wash my hands. I've got somethings to tell you about too." Rachael pressed on trying to ignore the sensations growing inside her.
Rachael went to the restroom and washed her hands. She could tell that at least one of Mike's many sessions occurred in here. There were splatters of cum all over the shower walls and even some on the ceiling. She was very careful to avoid any more of the drying bodily fluid. She could feel her nipples harden as the lust intensified. She didn't know where these feelings were coming from, maybe it was touching Mike's semen or maybe it was the strange musk in the air. Either way she needed to hold it together, at least until she told Mike about her accident. She finished drying her hands and returned to the living area.
"Mike." She started, feeling nervous. "When I left last night I was freaked out. You were turning into a horse and I panicked. Unfortunately, before I came to my senses I too started changing. I pulled my car over and transformed right there on the side of the road."
"What!?" Mike yelled "It's contagious?"
"I guess so." Rachael replied. "Anyway, I was even more freaked out during the change, but once I was done I felt amazing, amazing and incredibly horny. I tried so hard to get myself off, it just wouldn't work. I knew I couldn't fit in my car after that and I didn't know how to get back to you. So I started wandering around and eventually I found a house. I knocked on the door to ask if there was anyway who ever lived there could drive me back to your apartment. When the guy opened the door he fainted from the sight of me, and then..." Rachael was trying so hard to stay focused on the story but she was getting more aroused by the second. "I could smell him. I could smell his scent. His extremely male scent. I tried hard not to, but I don't know, I just started sucking his dick. He started changing too and when he woke up, I moved up and I fucked him right there on his porch. I'm SO SORRY." Rachael finished. She absent-mindedly started rubbing her thigh while she waited nervously for Mike's response.