Kat and Kay met in Kay’s room to discuss future IBT activities.

“Nice painting,” Kat remarked. “Do you ride?”

“In my imagination,” Kay replied. “When I was a kid there was this children’s encyclopedia, and one of the pictures was of the lush green field with horses racing across it and streaks of lightning in a dark sky. Something about it stirred me. So I got one of the girls in the art school to do this painting in exchange for some modeling. But I’ve never actually ridden a horse.”

“Maybe you should,” Kat suggested. “Maybe we should do ‘Modes of Transportation’ as an IBT project.”

“So horseback riding, and what else?”

“Oh, horseback, hot air balloon, hitchhiking.”

Kay laughed. “Those horses are so big. And so bouncy. If I even managed to stay on I’d probably end up with a sore pussy. How ‘bout if we start with me riding you?”

“You won’t pull my hair like its reins, will you?”

“Of course not,” Kay promised. “As long as you don’t try to buck me off.”

Kay mounted Kat. “Giddy-up,” she said, sliding up and back Kat’s torso. “Are these your spurs?” She pinched Kat’s nipples. “Mmm, my, what big spurs you have, so nice and squeezeable. Mmm. And what about your withers?”

“What are withers?”

“I don’t know.” She caressed Kat’s lips with her thumb. Pushing the thumb into Kat’s mouth, she said, “Yeah, suck my thumb, suck it like it’s a little cock.”

Kat sucked Kay’s thumb like it was a little cock.

“Oh Gosh,” Kay moaned. “Oh gosh oh gosh oh gosh,” she panted. She pinched and pulled Kat’s nipple and fucked her thumb into the suck of Kat’s mouth and groaned, “Oh gosh, Kat, I’m gonna, I’m gonna, I’m gonna gazzzzz.”

Orgasm over, she rolled off of Kat and the two girls lay on their backs holding hands and laughing.

“You ride good,” Kat said, “and now it’s my turn.” She scrambled atop Kay and pressed her cunt to Kay’s lips. “Suck my clit,” she said. “Suck it like it’s a big boy cock.”