Of course it's not.

James stared down at Aaron, her astonished face framed by her truly gargantuan tits from his perspective. They were bigger than her head, and her head was as big as Aaron's whole body. He could still feel cum bubbling through his pillar of a cock buried deep inside James, the transformative goo coating her insides - and consequently Aaron's shaft. James' womb drank it up greedily, small twitches coaxing more and more jizz through her cervix. With every drop, Aaron was filled with more and more trepidation. This wasn't going to end well, was it?

"Mmmh, I can feel it all through meee~!" James squealed, pinching and tugging her fist-sized nipples between two fingers. "It feels so hooot!"

She began gyrating her hips on top of Aaron, her gigantic ass pressing into his disproportionally huge balls repeatedly, forcing spurt after spurt of cum out of them and into her. Then, with an audible groan, it began. Whereas before, James had barely fit inside the room, now she soon hit the ceiling with her head, then her shoulders, and when her back began to press agains the wood, it began to groan and crack under the pressure - as did the floor where her legs pushed against it. James' calves alone were by now longer than Aaron's torso and legs combined, sandwiching him between the soft flesh. Her pussy, on the other hand, did not feel much looser around Aaron's cock, and his heart dropped into his stomach when he realized why: Of course his cock would keep up with James' growth, soaked in Aaron's cum as it was. His balls, too, were swelling more and more, already creeping up towards his feet.

"J-James, we... we have to stop this," Aaron groaned, raising his voice as he realized that the giantess wasn't hearing him. "James! Stop! We need to--"

"Hush, dildo boy," was James' only answer. "All you have to do is keep on stuffing my pussy. Let me worry about the rest."

As she said that, James reached down with one huge hand and wrapped it around Aaron's torso delicately, careful not to hurt him. Wouldn't do to break her toy, after all. Aaron's arms were pressed against his sides, unable to move, his face only just sticking out of James' fist. And then, she began to stand up. Determination on her face, James **** her legs downwards and her back upwards until the wooden ceiling began to splinter, the floor buckling under her shins. Aaron went crosseyed as James' pussy clamped down from the exertion, squeezing his cock almost uncomfortably hard. The sensation made his mind go blank, Aaron's body going limp in the giantess' hand, hips bucking ineffectually, only successful in slightly jostling his nuts.

"Al-... most... got... it..." James ground out through gritted teeth, and gave one last, mighty push.

The floor gave out under her legs, half of the room caving in and falling downwards into her step-father's office below. James only just managed to get her legs under herself, crushing Edward's desk underfoot, a hiss of pain escaping through her teeth. Aaron could feel his gigantic nuts between James' legs, their weight tugging at his cock still buried into the giantess' snatch to the hilt. They - and she - were still expanding, his balls now pushing against his feet, James only just fitting into the space between the first floor and the second floor ceiling.

"Well, that... ouch! That didn't go as planned," the giantess groused, her cunt finally relaxing and giving Aaron a chance to breathe. "But don't worry, dildo boy. I have so much more leverage now..."

James immediately got to using said leverage by planting her feet on the floor and pushing her shoulder against the wall to the outside. Aaron, finally able to think a bit again, began to struggle ineffectually against James' fingers, soon realizing in to the futility of the escape attempt. Even if he managed the impossible task of overpowering James, he still needed to get his cock out of the giantess, and then he would simply be too weak to move his own genitals by now, the mass of flesh outweighing him by far. Aaron felt terribly helpless. So why was his cock still throbbing so much?

A drawnout, splintering crack made Aaron whip his head around to the wall. James, sweating with exertion and careful to not stab himself with the remains of his room's floor, had actually managed to damage the wall enough for it to slowly give, and with a cry of triumph, the giantess broke through into the garden accompanied by an avalanche of debris. Breathing heavily, James looked down her body at the terrified Aaron. Despite just having destroyed part of a house, she didn't look any worse for wear, only a few scratches reddening her skin. At least she seemed to have stopped her growth, but James still towered over the two story house by head and shoulders.

"Whew, that was... awesome! I feel so strong!" James jubilated, a huge grin on her equally huge face. "Mmmh, that's making me sooo horny... You know what that means, dildo boy?"