Her sister

Juliana decides to go check on her sister's condition.

"I thhink I'll jussst go check on my sssissster firssst," Juliana responded as she turned to kiss her mother one last time.

"Alright, sssweetie!" her mother kissed back, "I thhink I'll try to clean up thisss sssexxy messs we've made."

Juliana unwinded herself from her mother's body, and she felt every part of her as she passed. Julia slithered over to the stairs and she realized she was in a predicament, how was she going to get up those stairs without hurting herself? Juliana snapped her fingers and the stairs rotated and turned into a ramp. She slithered up and turned the corner to her older sister's room. She heat-scanned the room first to see if Veronica was in her bed or not. Juliana saw a distinct formation on her bed and she assumed that her sister was just laying on her bed ill.

Juliana opened door quietly and she saw her still human sister laying on her bed. Veronica was a goth, with pale white skin, heavy eyeliner, black fingernails, black lipstick, and black hair with the roots and tips colored lime-green. Juliana observed that her sister was naked masturbating. Juliana felt her fangs prime, as if in anticipation of an attack. Veronica noticed a shadow hanging over her, and she jumped in reaction to being caught masturbating. Veronica screamed as she noticed a scarlet serpentine in the doorway. Veronica jerked and Juliana eyes dilated as she sprung foreword, sinking her fangs into her sister's neck.

Juliana staggered back immediately upon her realization of what she had done. Veronica' puncture had magically been sealed. The area of contamination began to turn green and indents in her skin began to form. It became clear that it was turning into lime-green scales. Veronica started crying inaudibly.

"Oh my, fuck, are you okay," Juliana asked worriedly.

Her sister tried to say something, but no sound came out of her mouth. The bite area began to grow outward until it became a snake head with a black hood.

"Vvveronica you havvve a head growing out offf your neck," Juliana gasped.

"My name isss Chloe, not Vvveronica," the new lime-green head hissed. Veronica looked at Juliana with desperation. Chloe turned her head towards Veronica and began caressing Veronica's cheek with her forked tongue, leaving patch of green scales wherever the tongue touched. Veronica started seizing. Juliana started to freak out. Chloe whimpered,"Put usss in your womb," before seizing herself.

Juliana did as instructed, feeling her waist expand to handle to extra body mass, as she inserted their spasming heads in first. As their legs were completely contained within Juliana, she felt her vulva close shut. Juliana instinctually wrapped her tail around her pregnant womb to conserve heat.

Inside Juliana's womb, chemicals began to pump inside their bodies. Veronica and Chloe's legs began to fuse together forming a long green tail. The scales traveled up their abdomen and onto their breasts. On their backside, their scales became black and traveled up Veronica's neck. Her hair began to mold into a complementary hood to match Chloe's, with black on the outside and green on the inside. On the back of their arms, the black scales moved down. But on the underside of their arms, they continued being lime-green. The same process occurred with their hands, with her black fingernails extending into fully functional claws. The green scales reached up her neck to her face where more serpentine features began to develop. Her nostrils became two slits and heat sensors began to form. Her green eyes shifted to yellow and her pupils became slits.

Veronica became conscious and looked around the dark red womb with her yellow slitted eyes. She started massaging her new smooth slimy scales all over her body waking her conjoined sister. Chloe took control of the left side of the body and began immediately fingering their vagina. They both turned toward each other and started to French kiss, with Chloe reshaping Veronica's human teeth into sharp fangs. They body moaned with orgasm, waking Juliana, who herself had also fallen asleep.

Juliana snapped her fingers and allowed herself to view inside her own womb to see what the commotion was about. She saw her new sexy sisters enjoying themselves, snapping her fingers once again and allowing a maneuverable penis to grow and fuck her sisters.