And give up the change to fuck a pussy that might fit his oversized cock?

"W-what?"

"I need you to fuck my sister... brother... whatever!" Lily shouted at him, gesticulating wildly at the loudly moaning James. "Don't you get it? Masturbation slows it down, but she can't keep it up if she seizes up all the time! You need to fuck her through this, or she'll get who knows how big! Quick, get your cock hard!"

"But... I can't..."

"Oh, for fuck's sake!"

Lily stood up and stormed over to Aaron, shoving his arms away from his cock so it fell against her body. Gathering it up, Lily nestled it into her cleavage and began sliding her soft tits over as much of its length as she could cover, kissing, sucking and licking the purple head. Groaning, Aaron felt a torrent of blood rush into his titanic member, the monster of a cock slowly inflating against Lily's chest. Behind them, James continued to helplessly whimper and moan, trying to get herself off, interrupted again and again by the recurring cramps. As Aaron reached half mast, Lily popped the tip of his swelling glans out of her mouth and turned her head towards her new sister, gasping at what she saw - James was approaching 8 feet.

"Oh shit, we don't have time for this." She shoved Aaron's still growing fuckstick into his arms and quickly stepped around him, gathering up his nuts. "Go, go, go! We need to try and shove it in like this! I'm sure she's wet enough!"

The pressure on his balls made Aaron stumble forwards, ever closer to the moaning, writhing giantess that had been James. Part of him felt like he was about to cheat on Lily, but on the one hand, they weren't really together, only had awesome, mindblowing sex... the memory made Aaron's gargantuan cock twitch as the mighty organ swelled even more. And on the other hand, there was no way he'd ever fit his member into Lily, or any other woman for that matter. But right there before him was the biggest snatch he'd ever seen, dripping with alluring juices, beckoning him to ram his enormous rod inside. Aaron swallowed, throat feeling dry all of a sudden.

Lily had soon maneuvered him between the raised knees of her sister. They already reached to Aaron's mid-thigh - if the blonde was right, it was high time he started to rail the ever-growing woman before she suffocated under her own weight like a beached whale. Not that the comparison was entirely accurate - James wasn't becoming fat, his proportions starting to resemble a Playboy centerfold, only enormously tall. Just as Aaron finished that thought, another cramp locked the redheaded giantess' body up, a grinding sound accompanying the accelerating growth. James' knees now almost reached Aaron's hips.

"Fuck, what are you waiting for?! Stick it in already!"

Aaron let go of his cock, letting the giant meatpole slap onto James' belly, the giant woman's muscles relaxing almost instantly as she raised her head and fixed her eyes on Aaron's cock head, hair surrounding her head like red halo. On Lily's body, Aaron's monster had reached her neck; on James', it barely touched the unserside of her still-swelling breasts. But that didn't matter to either of the three - James wrapped her hands around Aaron's hardening rod and began tugging, surprisingly gentle despite her size and obvious arousal.

"Oh gaawwd, I neeed iiit," she whined, her sultry voice full of need. "It feels sooo empty! Stuff me full of cock, fill me uuuup!"

Hearing the huge woman beg for his dick did wonders for Aaron's erection and he quickly reached full mast, drooling a glob of pre onto James' belly that was quickly gathered up and slurped down by the giantess with one hand. The other pushed Aaron's cock down her body until it was aiming at her huge, gaping snatch, Aaron himself taking a few steps back to not have his dick bent in half, but before she could pull him in, another cramp froze her body. But Aaron, desperately horny now at the prospect of jamming his gigantic prick into a waiting, needy hole, wasted no time stepping forwards, his cock sliding through James' locked up hand - and Aaron's drooling glans touched James' swollen labia.

"AAOOOHGOOOD!" The giantess' blissful scream rattled the windows, her whole body relaxing enough for her to pull Aaron's cock in deeper, his swollen head slipping inside with a wet popping sound. Lily was still standing behind Aaron, supporting his balls with both arms so he could move more freely. But she wasn't just an inactive helper: her hands were caressing Aaron's taut nutsack, adding to the blissful sensations running through him.

Even though James had to have reached a height of more than 9 feet, her pussy felt incredibly tight, almost painfully so. Aaron grunted and growled as he tried to **** more and more of his length inside, pushing himself forwards off her thighs, James wrapping her arms around her waist, holding on tightly as she gasped and squealed, throwing her head from side to side.

"So big, so biiig, so biiiig!" She wailed before beginning to rock her hips back and forth on her jiggly behind, shaking Aaron and Lily wildly as her snatch didn't allow much movement for Aaron's cock. "I need MOOORE!"

Aaron grit his teeth and took another step forward, forcing more of his cock inside. James' vagina was so incredibly tight that he could feel every single fold sliding over his veiny rod, wetness squirting out around his girth. But with every passing second, it seemed to become easier to slip inside - and a glance at James' knees revealed why. From where Aaron was, it had been hard to tell just from the giantess' torso, but the fact that her knees now reached as high as Aaron's hips clearly showed that she was still growing. That was both a blessing and a curse: While it gradually allowed Aaron to move inside her, it also meant that he was running out of time. James was likely already approaching 10 feet and showed no sign of stopping. If Lily was right - and the slowing growth proved she was - then maybe an orgasm would stop the growing entirely.

Two more small steps and Aaron hit the entrance to James' womb, almost all of his cock plunged into her pussy, prompting a surprised gasp from the giantess. Lily was still holding his nuts in both arms, running her fingers over Aaron's sack, and now began pulling her probably-boyfriend's hips back, his treetrunk cock sliding out of James' pussy, only to be sucked back in greedily.

"Mmmfh, yeees," James moaned, moving her hips to meet Aaron's thrust. "Fuck me fuck me fuck me!"

She didn't have to ask twice. Aaron began using his whole body, pulling out his cock as far as it would go, letting James cunt suck him back in at the end of every stroke. The growth was still continuing, so with every thrust, Aaron could push his cock into giantess a little easier, a little deeper, and soon, Aaron was hammering away at James twitching, squirting cunt, his reward increasingly loud wails and screams of bliss. James had begun to play with her tits with both hands, mashing them together, twisting and pulling their nipples, the sensations making her arch her back and shake her head wildly, red hair flying from left to right.

"Oh god, you're giving it to her good," Aaron heard Lily say from behind him, her voice coming from the small of his back where she knelt to cradle his balls. "I'm so fucking wet... But your balls are so heavy I need both hands..."

Aaron could barely process anything she said. James' cunt twitched and spasmed around his length, clinging so tightly to it as if she wanted to swallow it whole. Her slick walls felt incredible around Aaron's cock; while his enormous rod wasn't any more sensitive than before, there was just so much dickflesh to be caressed, squeezed, massaged by James sweltering cunt. Aaron felt more dick than man, his sense of self shrinking down to the huge, throbbing rod that finally fit into James to the hilt, pre drooling from its tip. With every thrust, his crotch slapped into James' puffed up labia, Aaron's legs and belly soaked with pussy juices. The feeling drove him wild, and even though Aaron's muscles burned with exertion, he did not, could not falter. If he slowed down, delayed James' orgasm even a bit, the giantess could well become a titan.

So he kept thrusting, hammering away at the writhing, squealing woman before him, her legs beginning to twitch with his every jab against her cervix. Aaron's nuts gurgled and churned audibly, preparing one of his frighteningly huge loads, and Lily cooed at the realization, kissing and licking the heavy balls in her arms. The shivers running up his spine made Aaron's dick tingle and throb mightily, almost throwing of his rhythm, but he persevered. But worryingly, the rapid thrusting didn't seem to be enough to drive James over the edge quickly enough, Aaron's own climax approaching quickly. Gritting his teeth, Aaron stared down at the obscenely stretched cunt his cock was pistoning in and out of - and noticed the almost fist-sized, engorged pleasure nub peaking out of its hood at the top of the slit.

"Nnnyeesss, I'm so-- I'm almost-- oh god, nhaaAAAH!" James had been on a hair trigger, it seemed - all it took was for Aaron to grab her clit with one hand and rub the slick, purple mass of nerves with his palm for the giantess to convulse and finally cum, her pussy squeezing down hard on Aaron's member. The intense pressure on his length and especially his sensitive head was enough to completely overwhelm any resistance he had left, and his heavy, overly full balls contracted in Lily's arms, the blonde squealing in delight as she sucked part of them into her mouth to let her tongue run over the skin.

As he had before in the living room, Aaron felt his cum bubble and rise, seemingly taking forever to pass through his impressive length. His whole body trembled, eyes fluttering closed as he jammed his cock balls-deep into James, glans swelling in preparation for his epic load. James breath caught in her throat as she felt Aaron's cock expand even more, stretching her even wider. Her legs shook madly to the sides of Aaron, and finally, with an audible 'splurt', his jizz shot inside a woman for the second time this day.

"Uuuhhnn, so hooot," James cooed, her orgasm slowly winding down, twitching subsiding. "You're cumming sooo much inside me!"

Aaron's own climax was still going strong, his nuts twitching wildly as they pumped their contents into James. Shot after shot spilled out of Aaron's tip, but the giantess' womb was more than able to take it, James' belly barely swelling as it swallowed rope after rope of sticky jizz. After what felt like an eternity, the last trickle oozed out of Aaron's distended urethra and he collapsed forwards onto the soft flesh of James' belly, his arms hanging down her sides without touching the ground, Aaron's softening cock still inside of the heavily breathing giantess. Lily lightly set his balls down until they rested against her enormous sister's expansive ass and ducked under her raised knee to step next to Aaron, kissing his cheek.

"You did it, stud. She's not growing anymore."