Samantha stared in horror at the squat cycloptic mutant that was once her little sister. The grotesque little creature was more preoccupied with exploring her newly changed body with the slimy tentacles that had replaced her arms.
In a panic, Samantha realized that she needed to fix this immediately.
"I wish that Rachel was normal!" she shouted. The ring once again began to glow.
Strangely though, Rachel didn't seem to be changing. She simply continued to grunt and moan as she coiled a tentacle around her enlarged clit and began to stroke.
Instead, Samantha felt her own body begin to shift under her clothes. Her arm spasmed and twitched and seemed to become multi-jointed, before the bones seemingly disappeared. Her fingers began to fuse together, starting at the base, slowly pushing the ring off of her hand as her arm finished becoming a tentacle.
As the ring clattered to the floor, Samantha realized what she had done. She had made Rachel's new monstrous form "normal", and now as her sister she would change to match her.
Samantha's body rapidly bloated just as Rachel's had, shredding her clothes in an instant. Her modest breasts grew even larger than Rachel's, stopping at a pendulous F-cup with a slight sag to them. A second pair swelled up from the flesh beneath them, growing to a slightly smaller E-cup and granting the first pair a bit of a natural lift. As her legs shortened and became claws, Samantha shrank until she was barely four feet tall and her skin turned purple. She was unable to see the changes to her face, but she could feel her lower teeth pushing forward into tusks and her eyes merging together into one single large peeper. A pair of tiny horns grew from her head and her hair turned a pinkish shade of red and then spread down her back like fur.
While she couldn't see much past her new muffin-top belly, she felt her pubic hair grow into a thick forest of that same magenta hair, and finally her clit erupted from her swollen hairy pussy and became an engorged pseudo-phallus that practically ached for release.
The two mutants now strongly resembled one another, but of course this was normal. They were sisters, after all. This was the logical conclusion that the ring's magic had come to.