"Yes, dear" [Patreon Exclusive] (Patreon)

You had only brought the device home so you could finish programming it in peace, those idiots in marketing always had some investor they just had to show it to, and with no grasp of the word ‘delicate’ or ‘fragile’, each time they returned it you were set back weeks just recalibrating it to normal conditions. 

Brittany was downright obstinate- ever since you gave her a few pounds; all she could talk about is begging for more. You were hesitant to use the Growth Ray on her in the first place, it was already a liability that she knew it existed, but with all the stress of work wearing your resolve, you justified that it could be a good treat for the both of you.

She was elated, her painfully modest figure really did look better with a little more downstairs. Just enough that she didn’t need to throw anything out, it was only enough to help her fill her pants a little better. Seeing how happy it made her about her figure, which she once lamented- made you happy- and so when she asked for a little bit more…

Now she had to cycle her wardrobe, the upgrade bumped her multiple stages from the 'less than average' into the ‘undeniably endowed’ department. Her rear was now definitely on the ‘big’ end of the spectrum- and neither of you were prepared for how much her otherwise lithe figure would make it stick out. Her entire demeanor changed, too- as she quickly grew obsessed with it. The attention she got in public went straight to her head, and she quickly learned how to leverage her new mass and confidence with devastating efficiency during your (markedly more frequent) intimate moments. 

But now, she wanted more. She wasn’t satisfied with just being bigger than average, she wanted to be bigger than everyone. She kept whittling at you, day after day- deftly weaving it teasingly into her dominance in the bedroom- “Just imagine if these were bigger.. “

When you finally caved, she wasn’t even excited- as much as expectantly smug. She had contaminated you with her lust for more mass, and now you too wanted to see her grow. You finished plugging in and calibrating the machine at your bedside, and covered your eyes for the blinding flash of its activation. 

Blinking away afterimages, you were able to see just as the effect started to kick in. Slowly, her already massive rear began raising upwards, and spilling outwards across the bed, and creasing where it met her lower back. Slowly inflating, each sphere of flesh surpassed ‘basketball’ sized, surreally inching their way to ‘beachball’ sized, and growing larger still. When it finally finished, you couldn’t help but tactlessly embrace the comical mountains. The warm flesh was soft and welcoming, enveloping you between multiple soft masses- but you could only barely reach your arms around one cheek. She cooed satisfactorily in your uncomposed indulgence, bending her legs to bury your comparatively small body further in her monstrous thighs and cheeks, and with an oozing confidence swollen to leave no room for disagreement, she directed you-

“Activate it again”