Chapter 6: Growing Pains
Bree’s shove did more than seat Mae deeper. It triggered something.
A low, visceral pulse, different from the rhythmic climaxes, thrummed through Mae’s entire form. It was a stretching, a filling, a profound and unsettling expansion from within. The sensation echoed the involuntary releases, but it was directed inward, into the very substance of her.
Ronnie felt it first. A slow, inexorable pressure that went beyond fullness. It wasn’t another jet of cum. It was the vessel itself, growing.
“Oh, fuck,” Ronnie slurred, her head lolling to the side. Her eyes, glassy and dilated, tried to focus on Bree. “Bree… it’s… it’s getting bigger.”
“Noted,” Bree said, her voice calm but her eyes electric. She was staring at the point where Mae’s base met Ronnie’s body. The slick, pink flesh of Ronnie’s labia was stretched taut, an already wide O being slowly, steadily forced wider. The skin gleamed, threatening to tear but instead yielding with a terrifying elasticity.
Bree reached out, not to pull, but to touch. She ran her fingertips around the circumference. It was like feeling the slow inflation of a tire.
“Fascinating,” she breathed. “The material is undergoing a volumetric increase. Plastic deformation of the host tissue is concurrent.”
“Stop with the textbook shit!” Ronnie cried, but it was a weak protest, her voice muffled by the pillow and her own deepening exhaustion. A new kind of stretch was burning through her, a filling so complete it bordered on violence.
Mae could only endure. The pressure was everywhere. She felt herself thickening, her shaft swelling against the tight, hot confines of Ronnie’s body. Each millimeter of growth was a struggle, a push against resisting flesh that finally, inevitably, gave way. Her own sensations were a chaotic mirror of Ronnie’s—a profound, aching stretch, a terrifying loss of boundaries.
Bree wrapped her hand around Mae’s base, now noticeably thicker than her grip. She pulled, experimentally.
Ronnie screamed. A raw, ragged sound. “Don’t! Don’t pull, it’s… it’s stuck. It’s anchored.”
She was right. Mae wasn’t just lodged; she was gripped by a body clinging to her new girth, a taut silicone seal broken only by slick fluids. Bree released her hold, leaving faint finger marks on the swollen shaft. She leaned closer, her analytical gaze missing nothing.
“Look here,” she murmured, more to herself than to Ronnie.
Behind the base, at what had once been a smooth, tapered end, a subtle swelling was emerging. Two symmetrical bulges, pushing out from the sides, growing with the same slow inevitability. They rounded, filled, becoming the size of plums, then oranges, heavy and full. A weight settled there, a new counterbalance.
“Are those…?” Ronnie panted, trying to lift her head to see.
“Testes,” Bree stated flatly, a scientist naming a new specimen. “Fascinating. A complete secondary sexual characteristic development. The cum production must be hyperactive Leydig cell simulation. The transformation isn’t random. It’s thematic.”
She climbed off the bed, her movements quick and precise. She returned with a handheld mirror from her vanity, positioning it so Ronnie could see the reflection of her own ravaged lower body and the grotesque, growing appendage buried within it.
Ronnie’s breath hitched. Seeing it was different from feeling it. The dark, swollen flesh stretched obscenely wide around a thick, veined column of flesh that was, unmistakably, still expanding. The newly formed balls, ruddy and full, rested heavily against her perineum.
“My god,” Ronnie whispered, and the sound was pure awe, all anger and defiance finally drowned out by the scale of the change.
“Let’s document the rate,” Bree said, fetching her notebook. She used a fabric measuring tape, carefully looping it around the thickest part of Mae’s visible shaft. She noted the figure, then checked the clock on her nightstand. “We’ll measure at intervals.”
She didn’t wait long. Within two minutes, the tape measure was too tight. She loosened it, got a new number, and scribbled again. “Approximately half a centimeter of increase in diameter every ninety seconds. Exponential, perhaps?”
Another pulse from deep within Mae. This one brought not just growth, but a fresh, hot trickle of her essence, forced out by the internal pressure change. It seeped into Ronnie’s already overfilled womb.
Ronnie’s soft, rounded belly jiggled, another half-cup of volume making its presence known with a wet, internal slosh.
Bree watched the belly quiver. A new idea dawned on her face, a spark of pure, unadulterated curiosity. She put the notebook down.
“We need to see the effect of external pressure on the growth. A controlled constriction.”
“What does that mean?” Ronnie asked, fear cutting through her stupor.
Bree didn’t answer with words. She simply climbed onto the bed, knees sinking into the mattress beside Ronnie’s pillowy hips. Then, with deliberate care, she straddled Ronnie’s swollen abdomen, settling her full weight directly onto the distended dome of her belly.
“Oh, GOD!” Ronnie shrieked. The pressure was monumental. It felt like her insides were being crushed upward, forcing everything—organs, fluid, the invading object—into a tighter, more desperate space. She gasped, her massive breasts shuddering with the strain.
Inside, Mae felt the world compress. The pressure around her became immense, uniform, inescapable. It triggered a panicked, instinctual response in her trapped consciousness. Resist. Push back. Fill the space.
The growth surged.
A sharp, stretching burn made Ronnie cry out. Bree felt it beneath her, a sudden, firm expansion pushing up against her own seat. She looked down, eyes wide. The shaft was visibly thickening, stretching Ronnie even wider, the faint thrum of expansion now almost audible—a low, creaking strain. Ronnie’s pussy starts growing to accommodate such a huge dick.
“Yes,” Bree hissed, leaning forward, bracing her hands on Ronnie’s shoulders. Her voice was a mix of triumph and hunger. “Yes, you are growing. Let’s see how big you can get.”
She rocked her weight forward, increasing the pressure.
Mae, trapped in a feedback loop of pressure and instinct, had no choice but to obey. She wants to be bigger!