The softening bulge pressed ever more firmly against the front of his shorts, lengthening and fattening as the seconds ticked by. His testicles, likewise, practically inflated, drawing his scrotum taut before it too expanded to accommodate his growing balls. His mouth was open slightly in pleasure, as a sigh escaped his lips. He watched his reflection in the mirror, fascinated, as the front of his swim trunks visibly started to push outwards. The netting lining the inside of the shorts quickly filled out, until it felt as if it was acting as a carriage gently supporting Mitch's bulkier manhood.

When the growing stopped, Mitch felt bloated between the legs. It was a warm feeling. An erotic feeling. He palmed his crotch his his free hand, and was delighted to discover that his genitals overflowed his smaller hand now. He rolled his dick around through the fabric of the swim trunks, eliciting a fresh flush of extreme arousal.

His cock was growing again, but this time without the tingling. He started breathing heavier as more and more blood was pumped into his enlarged penis. Slowly it uncurled itself, and started peeking up through the waistband of his shorts. It felt a little better, less cramped, but a mild panic began to set in as he realized that there would be no hiding his erection if somebody were to walk in on him right then.

And as if on cue, he suddenly heard footsteps upstairs, his sister's bedroom door closing, and more footsteps coming down the close-by stairs. And yet his cock was still hardening, lengthening up his belly. "Shit," he cursed under his breath, and frantically looked around for a solution to his problem.

Behind him. The bathroom. He was in there in a flash, grabbing his towel along the way and doing his best to quietly close the door and lock it without his sister hearing. He breathed a sigh of relief as he leaned against the closed door, listening to Rae walk straight past the door towards the kitchen. Then he opened his eyes and took stock of his situation.

It was a small half-bath, with only a toilet and a somewhat small counter with a sink built in, normally with only barely enough room to move around and do one's business. Normally. Now, the powder room was much roomier to Mitch, thanks to his notably smaller and shorter frame.

But this wasn't his main concern right now. Fully hard now, the entire head of his cock and several inches of shaft had slid upwards out of his swim trunks, and rested hotly against his belly. The lining inside his shorts was almost snug against his bloated testicles, cradling them lightly and caressing them. "Holy shit," Mitch whispered to himself as he beheld the results of his most recent command in the reflection of the mirror over the sink. With shaky hands he dropped his towel once more and placed his phone on the counter next to the sink.

Then he focused on his shorts. He quickly untied the drawstring knot keeping his trunks elevated, and allowed them to drop to the floor. "Holy shit," he muttered again, gazing at his new cock in all its glory. His eyes fluttered as he took it in one hand, letting his fingers graze down its impressive length. He shuddered violently, being more sensitive there now than he ever was before. He went weak in the knees, and braced himself against the counter in front of him before he fell forward. Pitched forward like this, his massive dick now pointed almost downward, allowing him to comfortably continue to gently stroke his length with his free hand. He shuddered again; his much more slender fingers felt wonderful against the drum-tight skin of his aching shaft.

Fuck, this thing must be like ten inches long! he thought to himself, his eyes slowly closing in rapture. Of course, it actually seemed even bigger from his somewhat diminished point of view, not to mention that his hands were proportionally smaller than normal too. On top of that, ten inches was certainly 'a lot bigger than average', and seemed even larger attached to his shrunken 5'1" frame. And yet, his testicles had yet grown on a whole other level! He allowed the hand that was stroking his cock to slide around the base and down to his scrotum, which was swollen to a level that would normally be a cause for concern, and his skin was stretched to its limit. But he wasn't concerned, because it just felt so damned good! His testicles' growth to the size of... oversized jumbo eggs... or small tangerines, maybe... came with an unusual increase in sensitivity. He couldn't hold both of them in one palm, and had to switch to each one in turn. And when he did he massaged it delicately in his small, slender hand, as if encouraging the flow of sexual hormones through his body.

His hand quickly returned to his massive cock, which he began stroking a little more earnestly. Finally, he couldn't stand any longer, and had to slide onto the toilet. His bloated nuts rested on the cold porcelain, but this didn't bother him. They were big enough that they were practically squeezed between his smooth hairless thighs, and they kept rubbing against them as he began to fully masturbate. He started panting heavily as he pumped his cock, his arm moving in broad strokes, trying desperately not to make too much noise in case Rae remained too close to the bathroom. He leaned back against the toilet's tank, jerking off much more insistently now as his other hand worked on of his bikini-clad breasts.

Between the increased sensitivity of his enlarged cock and balls, the wonderfully soft boob he was kneading and massaging, and the turgid nipple he was occasionally teasing, it was a wonder the Mitch didn't come sooner than he did. But the fact that his cock was basically too big for his body, it took more effort than usual to get off. But when he did, it was the most intense orgasm he'd ever had in his life! Ropes and ropes of cum erupted from his dick, shooting up into the air, upwards and forwards as he involuntarily jerked his hips. He gasped over and over, and let loose little grunts of pleasure, still trying his hardest not to make any real noise. After he was sure his orgasm would start to slow down, his risked opening his eyes to see what was happening, and witnessed the mess he was making. Lines of cum coated the wall opposite his seat on the toilet, and probably the floor in front of him. But not only that, a small splash struck in the cheek suddenly, making him aware that some of it had also landed atop his bikini and breasts, and was dripping into his cleavage. And still he came! "F-f-f-fuh-fuh-fuh--" he grunted over and over, shocked that his orgasm was lasting so long.

But thankfully, it didn't last forever. He was beginning to think it would, but just as the energy began to leave his body, his climax finally started to wane. Repeated spurts of cum turned into sporadic squirts, accompanied by random jerks of his hips. Until it stopped completely. Mitch slumped back against the back of the toilet, relaxing most of his limbs. His legs were splayed to the sides slightly. His softened but still fat cock rested atop his bloated testes, slumping over them and onto the toilet lid. Mitch absentmindedly rested one hand on top of his dick and balls, and the other on his thigh, so exhausted that it didn't matter to him that parts of his body were sticky with his own cum.

"Holy shit," he muttered again under his breath.