“Kasumi no!!! NOT THERE!!!” Akane’s head was rocking back and forth as she begged, pleading for her sister to stop playing with her body. Nothing could stop her now though, as she had a ball with the huge ball of fat her baby sister was. Two of her slender fingers pumped gently into the soaking wet slit between her legs as a puddle began to form underneath her hand. In her other hand, Kasumi got to play with Akane’s breast, finding it to be so squishy and yet nicely firm somewhat. All the while, she was pleasing her sister’s sensitive tummy much like Ranma and Shampoo, gently rubbing her body her body into the wobbling sphere and making Akane cry out with every stroke as loudly as either of her hands were doing to her.

“No stop!! Please, no!! Don’t do that!!” no matter how much her sister pleaded, she wouldn’t cease, and really, every cry made Kasumi only want to keep this up even more. Akane needed to worked over and given one hell of a night or else she would never change. Besides, this was really a lot of fun!

“Oh Akane, you feel so warm.” Kasumi sounded so hotly and cute. Her cheeks began to glow as she gently nuzzled her sister’s belly against her cheek, burying her hand deeper into the ball of breast fat while also stabbing her fingers as deep as they would go into her sister. Akane screamed, while Kasumi roughly rubbed her hand around in a circle, dragging the erect nipple around her palm and soon she began to sink her head into more yielding blubber “And soft. I feel so naughty.”

“DON’T SAY THAT!!!” Akane begged, unable to do anything else when she wasn’t screaming and moaning like the whore that she feared she was becoming. Kasumi’s words were supposed to disgust her, but instead she felt her body betray her as the fingers inside her were massaged and that got them moving again, which made Akane scream more, which got Kasumi moaning and it was a never ending slutty circle.

“Your boobies are big; Nibiki always wants her to be played with. She’ll have me massage them, suck on them, sometimes I fit both of them into my mouth and roll them all around, and others she’ll have me but on a dildo so she play with it inside me while giving me titty sex.” Kasumi confessed, the super delighted smile on her face as constant as Akane’s new volume of agonized screams. She tried to shake those images out of her head, but her sister was getting hornier by the minute. She was repeatedly squeezing her tata harder and harder while her cunt was starting to be fucked like it was Ranma back there, and Kasumi even began to grind her own soft chest into Akane’s stretched out tummy. She made the cutest moans you’d ever heard, but they were growing deeper by the hump. Big sister needed some action as bad as little sister, but even as her hormones took over, she still manage to delightfully reveal “Of course, that’s nothing compared to the things she does to my butt.”

“AAAAAAHHHHH!!!!” Akane was breaking, that’s what it felt like to her. She would take anything over this torture, but that was when Kasumi jabbed her fingers into the other wet hole she had. In one fowl swoop, she was silenced, but that was when Akane felt something dripping onto her tastebuds. She hadn’t forgotten that taste, and Kasumi said “I bet you’re delicious.”

She screamed as best as she could, she even tried to bite her sister, but Kasumi’s fingers were gone as soon as they came. Her sister hadn’t noticed her danger, instead she happily embraced Akane’s gut once again. Hearing her slapping so hard into the fat created a sickening slap that made Akane feel awful. That bloated jelly belly wobbled and shook in Kasumi’s loving embrace, but no jiggle made her let go. She knew what drove her sister crazy, and it was in the palm of her hand.

Once more, her soft breasts squished repeatedly into the stuffed gut while the girl herself rubbed all around it. She could feel Akane shivering underneath her; she was so close to cumming, and Kasumi knew it would be a big one. Wanting that more than anything, she began to slap her hands onto the blob of lard, with each strike making Akane squeal like the big piggy she was. Something inside Kasumi made her speak to the overweight girl “This you Akane, all of this is you. Oh you’re just so big and round, I think you may be the biggest girl I’ve ever met.”

“Noooooo.” Akane whined as tears formed in her eyes. She didn’t want to be called big; slut and pervert sounded like compliments compared to Cow Hips. Her sister didn’t look at her misery though, keeping her eyes shut as she basked in her younger sister’s sensuality as she felt hot all over. Soon she found herself licking the belly absentmindedly, dragging the soft flesh up with her tongue and showing all the little rolls jiggle as they disappeared back down. The only thing that made Akane look away was when she felt Kasumi start to nibble at her belly fat.

The scream from Akane was painful, but Kasumi never ceased, sliding that blubber between her teeth with ease and precision, her sister’s wails now making the whole belly wobble. Akane’s woes only intensified as she felt something hot and sticky rub into her, and was horrified to see Kasumi lightly rubbing her crotch into her. Tubbo’s belly was rocked and shook so much and she was overstuffed and had held on for so long, until at last, her body betrayed her one more time; she came.

Kasumi could smell it and all at once, she stopped. Her eyes sparkled and she clasped her hands in joy as she saw all of the wonderfully sticky stuff coming out of her sister. Her delight came to an end however when she spotted Akane’s head past her gut and saw her still trying to shake unwanted thoughts out of her head as she grit her teeth. Kasumi gave her a very disappointed look, saying “You haven’t learned a thing, have you?”