"Hm?" Catty ponders, looking down at a bizarre wriggling on her backside.
"What is it, Bratty?"
"Something's, like, snuggling into my booty." Catty doesn't seem able to see you past her girth, but, luckily for you, Bratty's looking at her backside too.
"You're right, girl. Some junk's on your trunk!"
"Is it Mettaton's autograph?!" Catty hops a few times out of a sheer glee, jiggling her butt, and you, with the bounce.
"No. It's, like, a wad of gum." She pinches your back (issuing an "eep" from Catty), peeling you off of her overalls. "Hey, this junk kinda looks like a human."
"A human?" Catty turns confused, eyeing up your flattened form.
"Well, I guess if, like, a human was under a rolling pin." While they discuss what you were, you feel yourself starting to pull yourself back together, still dazed by all of the bouncing and the jiggling on Catty's butt. Unfortunately, Bratty was still keeping a part of you pinched in place, keeping you stretched in that spot while the rest of yourself took form. "What?" Even more unfortunately, Bratty seems to notice as well.
"This junk, like, regrows?" Bratty uses her other hand to push you out a bit, seeing the part of your flesh he still pinched stayed where she held it while you moved away.
"Hey, check it out!" Bratty grabs your left arm, and pulls it to the side, stretching it out to spaghetti like proportions.
"Woah, putty human..." Catty says, perplexed by your limb pulling out.
"No, it's..." Bratty turns her back towards Catty, pulling and squeezing your appendages and body, twisting and curling you with yourself here and there, issuing distorted screams from you, before turning around, presenting you. "... a catty cradle!" Your entire body was stretched and kneaded together like yarn, forming a squishy human version of the string figure cat's cradle.
"Oh, oh, let my try!" Bratty un twists you, giving you enough time to reform, only for Catty to snatch you out of Bratty's hands, turning her back towards Bratty. She kept stretching your appendages and body, forming knots with said appendages and body, earning more distorted screams from you as she stretches, kneads, squeezes your body. The difference, Catty clearly didn't know what she was doing. Whereas Bratty had a clear beginning and end and everything in between, Catty was constantly second guessing herself, squeezing one part of you out of one loop of you and into another loop, undoing loops only to redo them, she kept trying to do anything she could to match, maybe even outdo, Bratty's putty human creation. "Tada," Eventually she reveals you, reduced to knots upon knots of stretched out flesh. Your face was pressed against your own backside, you felt your legs touching your back opposite your belly button while your arms were knotted under the backside of your knees. "A... knotty human," Catty says, half smiling.
Bratty just takes you out of Catty's hands, unknotting you for what felt like an hour, until you were back to your original form. This lasted for all of two seconds until every part of you, except for an arm is wrapped up in a glamburger shape. She proceeds to wrap your arm around your body several times. She turns, brandishing you. "Yoyo human!" She wraps your hand around her index finger before flicking you downward, only for you to splat against the ground, leaving an uncomfortable few seconds of awkward air. Eventually, Bratty starts to chuckle. Her chuckling leads to a roar of laughter as she starts to keels over, while you're still reforming. Catty starts matching her laughing magnitude only after she starts laughing.
Struggling to hand you over, Bratty offers you up to Catty, who barely manages to grab you as she laughs. "N-*snrk*-no-*snrk* I-I-I-it's a..." Catty barely squeaks out her sentence between fits of laughter, only managing to stop while she kneads your body.