Peter looked down at his once again monster body, his diminutive girlfriend stoking every protruding muscle with utter lust in her eyes. There was something about filling his strong expanding flesh that turned her on, and Peter had to admit, him as well. But it was his turn to have some fun.
"Hey, Joce, let's play a game...What's the first letter of the alphabet?" Joce snapped out her lust-filled daze to look up him.
"Huh? Um, A?"
As soon as the letter left her lips, her shirt suddenly became a bit looser in the front. Her B sized breasts had shrunk down to smaller As. She looked at Peter, confused. He grinned.
"Yup, and next comes...B..." As soon as the words left his lips, her chest resumed it's normal appearance. "What comes next?"
Joce finally understood the idea of the game. "...C..." The warm tingle sent electricity down her spine as her shirt tented a bit as both her breasts and bra jumped a size.
"And then D..." The shirt was getting a bit tight, and even with the bra, her assets began sway as they continued to a much more secluded area along the woods.
"Oooh, E comes next..." The tingle of transformation was being matched by a steady throb in her core. Her loose shirt was now showing much of her mid drift, and even through her bra, her larger nipples could be seen poking out under the shirt.
"Then F..." The shirt was starting to look painted on, trying to contain the massive mammaries shifting underneath. They had left the street to walk in the dense park, unseen by anyone else out this late out at night.
"Gee..." Joce groaned as the tingle increased the throb between her legs, and the pressure of the shirt around her chest.
Peter was not unaffected by this sexification of his girlfriend. His hands cupped the heavy, warm orbs, enjoying the way they filled his palms. His own side affect of growing every time Joce did was also in full affect, but so entranced by the sight and feel of her, he hadn't even noticed the sound of the seams bursting on his jeans under the pressure of his own thickening muscles and the massive member slowing engorging.
"Now comes H.." At this point, Joce's seams began to give way, and the bottoms of her black lace bra could be seen peaking out the bottom. "...and I like it." The seams gave way.
"Don't forget J, or K!" With that, most of the black lace orbs into view from the tatters of the shirt. Joce would never have been able to support them on her own, but Peter was happy to support them. His own cock had become fully erect, shredding both the front of his jeans and the underwear beneath them. It's head brushed happily against his girlfriend's massive bosom.
"L's nice, but I think they're M for massive..." He tore away the last scraps of her shirt to see them swell towards him. The tingle of transformation was too much, Joce dropped her hands into her jeans to finger her clit. Her other hand brushed against the giant rod, gently brushing against it and feeling the blood pumping under the skin.
"N-no, it's O, for overflowing!" Again, her breast leaped forward, the black lace so large her nipples, now the size of gold dollars, could poke out, into the cool night air.
Joce's breasts were now larger than any other on the planet...
And they were only a little over half way through the alphabet!