A New Growth Spurt [WM]

"Cheers!" Nefer responded to Lily's cheer to drink, downing her futanari potion in one gulp. She looked at Lily with a flush as the potion had already begun to affect her. "What're you... She asked, stuttering as she began to combat the pleasure spreading through her body, starting at her stomach.

Nefer, almost instinctively, spread her legs as her cheeks flushed, her right hand went to her pelvis. "Hooo boy," she sighed, her chest heaving and her stomach quivering as pleasure rolled through her body. Nefer's hips involuntarily bucked on their own, each time a shockwave rolling through her body, and it was clear that she’s fighting to keep herself from masturbating right in front of Lily.

Streams of her arousal coursed down the inside of her legs as she struggled to keep herself upright from the pleasure, wetting the pants she was wearing with fem cum. Suddenly, a new growth emerged above her clit, ballooning to twice its size, three times, then, with an awkward jerking motion, it began to bob up and down underneath its own weight as a bulge within her pants.**

Finally, it burst through her pants, sending tattered scraps floating to the ground. And there, between her legs, was a 12 inch, throbbing cock. Two hefty balls quickly followed, dropping from the base of her cock in the hole her new penis made in her pants. Nefer looked down in shock and arousal. "Wha... What just happened?.. Is this... my cock?.." A large glob of pre leaked from her tip and splattered onto the ground as if to answer her.

Lily watched in a stunned silence as she watched her sister's transformation for a moment before she felt a warmth spreading through her abdomen and traveling through her pelvis. She gripped the sides of the couch and inhaled deeply through her mouth. "Oh my god Nefer! You have a...ahhhh...aaahhhHHHH!"

Her words trembled and faded into a mix of a moan and whimper as the warmth grew intense. She clutched the fabric of the couch as she flickered her eyes towards her crotch, feeling the sensation building between her thighs. Her legs trembled slightly as she spread them apart, cupping a hand against the inside of her thigh as she panted faster and harder by the moment.

Her eyes rolled back slightly while she bit her lip, a glazed expression rolling over her face. She watched as a small nub began to swell beneath her leggings. She could feel her clit growing more sensitive and quivered as it rubbed against the fabric as it grew.

"N-No way that's..."

Her chest heaved as there was a twitch from the mound as it doubled in size, filling up more and more of her leggings as she moaned. Her juices began to seep through as it continued to swell until there was an audible tearing sound followed by a thick semi hard cock burst through and flopped against her thigh with a heavy smack. A pair of swollen and engorged balls dropped out from the base of her new dick as a slit opened up at the tip, leaking a copious amount of precum onto her leg and the couch.

"Wow...I t-think...I know what a futanari must be sis."