"Yes but who ARE you thinking about?" Ashley asked as she licked the head of his cock.
"Our math teacher, Ms. O'Neil..." Michael moaned, "she's so curvy, and I want those lips of hers around my cock!" he continued as he stroked the base of his rod, the top half between Ashley's melons.
"She does have big lips, but I think my tits are bigger than hers now." Ashley smirked as she felt some precum land on top of her large breasts.
"Yea, and my ass is, like, twice as big as hers now." Natalie giggled, reaching her plump arms over Michael to palm his balls with her hands. "Besides, its not like just talking about her will make her fat." she shrugged, gently rubbing. They didn't know what Michael knew, making him smile as he started to cum between Ashley's tits. Knowing that Ms. O'Neil was about to get a lot sexier and hornier made him cum more than usual, though that may have just been the growth.
But it was still a lot.
"God damn, Michael." Ashley said with a rasp as cum started to overflow the top of her boobs, she was blushing deeply as it started to flow down onto Natalie's arms. "Just how much can you make?"
"Ugh, its so sexy... i want all of it." Natalie said, gently squeezing his balls before getting up to drink some of it down. Michael felt her pudgy tummy rest on his flat one as she moved in. He watched her licking Ashley's boobs as lust over took his mind again. He imagined if Ashley's boobs lactated, a lot, like the milk she had talked about before. Super fattening, and then if Natalie and Ms. O'Neil, or maybe even Ashley herself guzzled it down to plump themselves up. Michael couldn't think further on it as he orgasmed again, the head of his cock revealing itself above Ashley's cleavage as the girls both tried to get their mouth on the head, growing fatter as they always have, the bed creaking ominously under them. Michael's body burned for him to keep jacking off, knowing what it would do, but he didn't want to break the bed ... yet. He slid out from under the girls and slowly got up, flaccid cock hanging to his mid thigh.
"Where's the shower?" he asked Ashley
"Its across the living room, be careful not to scare Meredith." Ashley responded, eyes fixed on his package.
"Who's Meredith?"
"My roommate, she lives in the room across from here." Ashley smiles cutely, "she likes to work on stuff at the table in the kitchen." Ashley looked down at her bosom and then back at Michael, "mind if I join you? I need to clean myself up as well." she winked
"Is the shower even big enough for you?" Natalie asked, prodding one of Ashley's thighs.
"Maybe... but it would be more fun to find out!" she giggled, getting up and pulling out some towels. She turns and hands one to Michael, struggling to hold her boobs in one arm at this point. She looks down at them, "...though, I'd rather just lick all this off... too tasty to waste like that." she lifted her boobs close to her face and started licking them, Michael staring at the display after putting a towel around his waist. She moaned softly with each gulp.
"I want some!" Natalie pouted as she rose from the bed, waddling over to Ashley and joining in, her tremulous thighs jiggling with each movement. Michael awkwardly stepped out of the room into the living room half erect, and tried to quickly make his way across to the bathroom.
"Ashley?" Michael turned red as he heard what must've been Meredith call out, "what was all that noise yesterday? I could barely focus!" Meredith suddenly came into view: short, shoulder length brown hair, plump lips, skinny but curvy and wide eyed as Michael's meat rose from behind the towel, his balls rapidly refilling with seed.
"N-Not Ashley!!" he responded as one hand automatically gripped his cock and he darted for the bathroom door. His mammoth meat uncomfortably pressed against it, not used to it's length, before he entered the modest bathroom. He breathed a sigh to calm himself before hanging the towel up and turning the shower on, erection still raging as steam slowly started to fill the room. As he entered the shower and let the warm water run over him, he found he was jerking off without even thinking about it. "Kinda dangerous, with what it can do, I guess-ah~" he ended with a moan as his mind automatically drifted to more perverse thoughts, like if Meredith had bigger boobs to go with those delicious looking lips of hers, or if she were just curvier in general, or maybe if she-
Michael moaned as cum started to gush from his rod, he braced himself against the wall of the shower as burst after burst of seed blasted against the wall and splashed on the floor. He was honestly afraid it would clog the drain completely as he felt his fingers be spread apart. After a few more moments, his orgasm finally ended, he look over the mess he made and was glad he was in the shower for it. Michael looked down at his cock, finally getting a good look at it and in awe of how big he had gotten. As he looks at it he can't help but think about how he got here, fattening Ashley, Natalie, Ms. O'Neil, and now Meredith, he thought. He thought about how big they had gotten and how big they could get, and how desperate they were getting for his cock and his seed. Michael smiled as his seed burst forth from his cock again, knowing the girls would just be bigger and more desperate from him.