Erika turned to give Zoey a questioning look but before she could see anything Zoey reacted and pushed her up against the shower wall. "Oof! WHat's the big idea??" Said Erika, a little annoyed at her friend's horseplay.
Zoey for her part was shaking a little from her recent orgasm but focused her strength on her legs to keep herself standing.
"Just figured I could give you a backrub with it as lubrication first! Don't worry, this stuff works great! Just a little messy when it's coming out of the 'bottle'!" Zoey giggled to herself at this utterance in her thoughts and began spreading the cum up and down the back of her friend knowing full well the semen was starting to seep into Erika...
Erika just shrugged and turned to face the shower wall, letting her friend massage her hands all over her back, feeling as they gripped and massaged her muscles. It felt nice, and the 'shampoo' Zoey had used somehow made things feel even better. It created a warming effect that spread to wherever the 'shampoo' spread to. Erika soon found herself daydreaming, with a dreamlike smile slowly spreading across her face.
Zoey just kept on massaging her friend, but as she saw Erika start to lose focus, she knew her cum had started to work and so she started to vary her hand movements. They started to drift lower and lower, following Erika's spine down to its base, where she began to slide her hands in between Erika's cheeks, spreading them and moving them around, squeezing and gripping while massaging them. She was delighted to see a small nub begin to form at the base of Erika's spine, as well as tiny black hairs along the top part of the spine signaling a mane growing in and kept up her movements to see what else would happen.
Erika barely noticed where Zoey's hands were. Her daydream had shifted to a more sexual tone as she pictured herself in a shower with a very well hung man, who was caressing her just like Zoey was. Her pussy began to wet itself with juices as she pictured the stranger grab her hips and start thrusting himself into her.
Zoey saw this change in Erika's thoughts come over her as below her grip Erika had started thrusting her hips towards the wall and making small moaning sounds. Erika's fingers curled against the wall and she pressed her left cheek against it with her eyes closed, imagining she was getting railed by a stranger, not even noticing her friend in the shower anymore. Zoey took this chance to really started working over Erika, Her hands flying across her friend's ass cheeks, spreading them and sliding in between them to land on Erika's pussy. Erika's tail was growing quicker now, about 5 inches in length. She was really thrusting her hips now, and Zoey helped her out by masturbating her puss as fast as she could. It all culminated with an earsplitting "OHHHHHH" emitted by Erika as she clenched her vaginal walls around Zoey's thrusting fingers and proceeded to slowly slide down the shower wall.
Erika sat there crosslegged for a good minute. Zoey took this chance to kick things into the next gear. She began stroking her donkey dick, which was already hard from masturbating her friend. After a few seconds, she was ready.
"Erika."
Erika turned slowly, dreamily to face her friend, and as soon as she did she received a blast of semen straight to the face. It made her recoil her head back a bit from shock. Zoey was not done though and proceeded to pump out another load on her friend's breasts and one final load onto her abdomen, which ran down to her pussy.