"Why don't we get you your first little slut first?" Jen said.
"Really?!" Emma said, nearly jumping out of her seat, her cock straining her miniskirt again.
"Of course sis! Why don't you call up Sylvia?" Jen said, smiling, her erection rising just like Emma's.
Emma took out her phone and immediately dialed Sylvia's number.
Jenna couldn't hear their conversation (she was too busy imagining Sylvia being bent over by her sister and her own driving) but she could hear a bit of their boring chit chat (Yeah, that's great! I'll be over soon, my sister's driving me!) and eventually made her way to Sylvia's house.
*****
They arrived a few minutes later. Jen had to hold back Emma who was so ready to ravage Sylvia that she hadn't even considered knocking on the door. Jen knocked on the door for her. "Hold your horses, sis." she said, holding back a laugh.
"Don't make jokes! I feel like my balls are about to burst, and you got me into this mess!" Emma said.
Jen still couldn't stop giggling to herself when Sylvia opened the door.
"Hey, girls..." she started. Her entire expression changed when she smelled Emma's strong pheromones.
"Come in! Come in! My parents aren't home." She said, a smile on her face.
*****
No later than a minute after they'd arrived, Jen and Emma were spitroasting Sylvia on her bed. Sylvia happily sucked Jen's huge horse cock while she took Emma's deep in her pussy.
"SOOOO GOOD!!" Emma said, as she came inside of the new slut. Jen came quickly after.
The two horse herms backed off of the bed, dripping their sperm everywhere as Sylvia changed.
Her hair, which had been cut in a short pixie style and colored a bright green, lengthened down to her ass as it's color followed. It became even more bright and vibrant as her ears moved to the top of her head and became long and floppy before stretching out and taking a horsey quality.
Her breasts grew from C Cups to G cups, filling with corruptive horsey milk, just like Emma's and Jen's. Her face changed, any imperfections disappearing, her nose a bit smaller, her lips plumper, and her eyes a bit bigger. Her waist thinned in as her stomach became toned. Her hips jutted out as her ass rapidly expanded. A horsey tail grew at the base of her spine.
Her ass and pussy grew and changed color as they became equine. Quickly after, a 16 inch horsecock grew, just above her vagina; below it, a huge pair of horsey testicles.
Spurts of cum suddenly shot out as she had an orgasm, her transformation complete.
"Whew, that was great girls! I’d love to see you again soon." She said, and then walked over and kissed Emma. "Especially you... no offense Jen."
"None taken." Jen said with a smile.
She and Emma cleaned up and left.
"So..." Jen said, on the ride to see some of her old friends.
"What?" Emma asked.
"How was it?" Jen said.
"It was really, really nice. But I miss her." Emma said.
"Oooh, someone's got a horsey crush." Jen said.
Emma blushed and sunk into her chair.
"Oh! We're here." Jennifer said, cutting the conversation short.
"What do you mean? This is just an old farmhouse." Emma said.
"This is where the new me was born. Come with me." Jen said.
She knocked on the door.
"Like, just a sec! I'll be, like, right there!" She heard Janet call from inside.
"Woah, she sounds like a ditz." Emma said.
"She is." Jen said, licking her lips as she felt her cock rise once again.