(Someone wanted a Dipper to be a cat, so this is my short take on this. And I know you will be screaming "Nekos!" In the comments, so stop. Think of something else to scream about)

"Get back here!" Dipper screams, jumping over the couch after Bill.

"Nope!" Bill screams, running through the kitchen.

"Hello Bill," Mabel says, before taking a sip of her coffee.

"Morning Mabel," he bites running up to the table. Jumping up on the table, he jumps through the window. "Bye!" He yells, running off into the forest.

"Come back here cowered!" He screams, running to the door, then stopping.

Mabel looks up from her magazine, smirking at her little brother." What's the matter, bro bro?" She teases, smugly smiling at Dipper, who is starting

"Nothing!" He yells, stomping back up his stairs.

"Morons," she chuckles to herself, going back to her reading in the afternoon shade in the kitchen. Waiting for night, so she can be picked up by her boyfriend.

Soon, Dipper came stopping back, with a red beanie and jeans, covering his tail and ears. She smirks." Won't you be hot in that?" He teases.

"Not now. I got a triangle to catch," he deadpans, slamming the door behind him as he leaves.

Dipper races through the the warm forest. Mabel was right, it is hot in theses. "Bill, com back here and fix me!" He yells. Suddenly, Dipper's legs gave way, for someone jumped on his back. "Bill, get off!" Dipper yells, face in the dirt.

"You said you wanted it fixed! Now show me!" Bill smirks, pulling off the beanie and yanking down Dipper's jeans.

"No! Don't look!" Dipper yells, pushing away from Bill. His face red, tears in his eyes while covering the cat ears.

"But you look so cute," Bill hums, straddling Dipper's hips.

A hiss escapes Dipper's throat, before he streaks, covering his throat with a red face. "What the hell was that!?" He mutters. "Bill please, it's scaring me," he whines. "I don't want to be a cat," he hisses, the ears moving back. "Their moving," he whines.

"I think it's adorable," Bill coos while leaning forward as his fingers gently rub his right cat ear. "Let's have some fun before I go urn you back," he says smirking.

Slowly, his lips maybe contact with Dipper's. Gently, he lifts Dipper up onto his lap. Dipper starts to purr into the kiss and his tail waves back and forth.

"Bill, where outside," he whines into the kiss.

*

Mewls escape Dipper as Bill thrusts into him. His back rubs into into the bark of the tree.

A dark chuckle form in Bill's throat," your a cat in heat," he whispers into Dipper's ear, making Dipper gasp.

"Don't say that," he chokes out, his legs wrapping tighter around Bill's hips. Tears falling from his eyes.

"But it's true. Your so cute as a cat," he says, bitting cat ear. "I wonder if you cat get pregnant like this?" He chuckles.

"No," he purrs, clinging onto Bill's shoulders. "Bill, please," he slurs.

"Okay, okay," he whispers, licking Dipper's ear. Suddenly, Bill picks up speed, making Dipper mewl loader.

"No, Bill. To-to fast," he gasps, eyes shutting tight in pleasure.

"Good boy," he whispers. "That's it," he hums.

Dipper cums, bitting. Down on Bill's shoulder with his little fangs.

*

Bill strokes Dipper's hair as the boy sleeps on his lap. The tail and ear were gone, but he's still cute.

"Sleep tight kitty."