"I wanna make myself huge like you grandma" said the completely average collage age student
"mmm that a great idea sweetie" said the powerful elder licking her lips
just as her stomach rumbled...
-oh excuse me this new body seem to need more fuel, I'm gonna cook something up for both of us while you make your changes, have fun
-oh I will, replied Jonny with a smile as her grandma leave the room
"but first I need to confirm something" he though as he opened his grandma profile clicking in the kinks tab a list of checkboxes appeared the first 2 that were checked already were muscle male and muscle female, "no surprised there" he though as he kept scrolling the list when another already checked box appeared: incest.
"as I though my sweet innocent grandma isn't so innocent, tho who I'm I to judge, I was totally into it while worshipping her muscles just a moment ago"
" well if its my sweet grandma secret desire then it shall be done but the only way she would act on it would be if... aha here it is the sex drive option lets put it in extremely horny, ok and now lets put a timer so this change applies in 10 minutes that should give me chance to make my changes" like that he switched to his own profile found the muscle option and set it like his grandma was and put to start in the changes in 2 minutes then he run to the kitchen
-o wow grandma that smell really good
-oh you haven't change at all?, said the massive grandma as she plated 2 chicken breast with some potato salad
- don't worry about it, changes should start any moment now I just though that maybe you would like to watch
-mmm lunch and show sure honey, she said taking the first bite of chicken
as if hearing her the chronivac started working, Jonny started to glow as all his muscles started contracting and expanding adding new mass every time, starting at his legs where the calves grew dense and defined, diamond shapes 23 inches around bursting the skinny jeans he was wearing "oh this feels amazing" he said as his quads grew to veritable tree trunks destroying more denim and pushing his bulge up front into what was left of the pants, but before he could open the zipper to relive the tension his glutes grew into iron hard bowling balls of muscle ripped trough the waist of the jeans leaving him with only a pair of white underwear stretched to transparency, he felt the relive and pulled up his shirt for both of them to admire as the little extra fat he had melted away and in its place solid wall of eight abs appeared
he then let it drop as he felt the grow wave hitting his upper body, his shoulder growing into canon balls while drifting apart do to his widening back and his traps and neck growing and making visible a huge vein which dropped into his pec which inflated into huge cushions of muscle tearing the shirt apart, looming an inch over his rock solid abs and pushing his growing biceps into a 45 degree angle,
he hit a double bicep pose as his massive arms finish inflating with pure muscle at 27 inches around biceps, horse shoe triceps and huge veiny forearm to match.
"so what do you think, grandma did you like it" he said changing into a side chest pose
she had been staring the whole time, finishing her food absent mindly.
"that was quite the show honey" she was actually containing herself from something else it was her grandson after all teasing is one thing but now she was quite thirsty for him.
a faint glow from Gloria told him that the change he had programed for her took effect, with that knowledge he smiled walked to her extended his hand and said "would you do me the honor of posing with me".
with her hornynest raising every moment she no longer cared if it was wrong "sure thing sweetie, but if were gonna admire our bodies I want us to admire all of it " she said grabbing each side of her night gown, pulling and ripping it in half and posing in a double bicep with her round full boobs bouncing as she move the pec muscles below, the expectable caused Jonny to immediately pop to full mast bursting his underwear, " I guess that's also a muscle, it used to be almost 7 inches now it has to be 10 at least" he said grabbing it while watching as his grandmother shiver and moaned, hungry looking at it "but you aren't done, here let me help" he said shoving the table out of the way
he hugged her slowly feeling her rippling muscular back with his hands as his massive pecs touched her boobs the sensible nipples sended another wave of pleasure causing her to moan loudly, he grabbed the waist band of her ever wetter pajama pants and in swift motion ripped them off.
"your being a really good boy you earned a kiss from your grandma" she said giving him a deep tongue kiss
"anything to please my granny" he said as their powerful bodies rubbing each other their hands exploring every deep valley a huge peak in each other body
"if you want to please your granny so much then take me fuck me right here"
he didn't need to be told twice, grabbing her of the ground pining her to the wall with an ease that only he could had, he inserted his huge cock into her wet and hungry lips, the incredible muscles of her vagina making it the tightest anyone had ever feel while his monstrous cock and powerful trust of his hip muscles had her orgasming with in seconds, and so they fucked right there in the kitchen against the wall, on the floor and on the table at least till it broke below their powerful muscle, they fucked for hours till in a break she notice the clock wall "8 o'clock o no your grandpa is going to be here any minute what is he gonna think, what are we gonna do?" she said panicking.
Jonny hugged her and with a devious smile said "don't worry granny whatever he thinks we got the solution right in the other room"