Ken sighed as she sat in her sister's coils, her sister rubbing her hair affectionately as Ken's head lay on her substantial breasts. "I have an idea sister." Ken muttered in her soft voice as her sister nodded. "Also... you are now Sophie, and I am Sophia." Sophia said as Sophie nodded. "You, and you." Sophia said, pointing at the pregnant girl and the only other girl with a vagina. "You." Sophia said as she pointed at the other girl. "Are going to lose the ability to walk on two legs, you will now drag yourself where every you want to go. And now your digestive system will be similar to that of a worm's, in that you can eat dirt and sand in front of you to dig before shitting it back out." Sophia said as the woman grunted as the changes took place.
Sophia and Sophie watched as the woman dropped to the sand on her belly, groaning and moaning as her digestive system changed from a human's to a worm's. The new worm woman laying in the sand as she looked up at Sophia. "Now I want you to dig into the sand before popping back out, but only your head, leave the rest of yourself under the sand." Sophia commanded as the woman looked down at the sand before sticking her head in the sand.
Crunching was heard as the woman slowly ate her way into the sand, her stomach already starting to bulge from the sand she was eating before her butt quivered as a large line of poop started to flow out if it. The lady was eating and shitting at the same time as she dug into the sand, slowly squirming until she was completely under, her head popping back out eventually as she looked back up at Sophia.
"Nice, now you." Sophia said, pointing to the pregnant woman. "You are going to lose the ability to use your legs as well, but you are going to lose the legs for a mermaid tail. On your back you'll grow a dorsal fin and her fingers will gain webbing. After these changes you'll make your way to the sea before swimming out to become queen of the mermaids, and your babies shall become mermaids as well." Sophia said as the woman nodded before falling into the sand.
Sophia and Sophie watched as she changed, her legs merging as a dorsal fin grew out of her back. the new mermaid dragging herself towards the sea as Sophia looked down at herself and then at Sophie. "Sophie, I want you to push my legs back into my body." Sophia said as Sophie nodded, Sophia climbing out of Sophie's coils before laying on the sand as Sophie grabbed her legs, pushing them into her as Sophia grunted from the changes, her legs shrinking until Sophie had pushed them into her completely, leaving her just a torso without legs. "Now I want you to make me a tail just like yours Sophie." Sophia said as Sophie nodded. "Yes sister." she said as she grabbed Sophia's lower body and pulled.
Sophia grunted as her skin extended, her spine pulling out with her new tail as Sophie kept pulling until Sophia had a fleshy tail push like her. Sitting up slightly Sophia willed her tail to raise up, shaking the tail right in front of her face with a smile at the fleshy appendage. "Thank you sister." Sophia said as Sophie smiled. "You are welcome sister." She said, wrapping her own tail around Sophia's as Sophia turned towards the remaining girls, all three of them with dicks. "Now what shall we do with you?" Sophia asked.