Okay I waited to upload this but I can't get the story for this ready so I'll just udate it when I do.
This is a piece I commissioned  satsumalord Not bad for a first commission from anyone if you ask me ;)
So okay remember the concept drawing I did of her here? http://www.furaffinity.net/view/15956100/
Well I did decide to do more than a weight gain story for her, I gave her a special power much like Blooberboy's Nyka but as you can guess it
does a bit different and is triggered by a different substance. So as for that story here of it this is a sequence of her getting in contact with it.
Expect more coming soon

EDIT:
Okay so I lied alil I came up with the shorter part of a story for her in this situation but I think it covers the whole start/

Story:

It was a hot summer day one day and inside the Blackheart manor it seemed quite, despite the climate control being on there was one half
furry dweller who couldn't get comfortable. She layed sprawled out on her bed her silk sheets pressed against her sweaty body, it was probably that her room was on the second floor, that contributed to her misery or maybe it was the window view that contributed to her heated misery. She had tried everything she can think of too cool off from a cold shower (Which she did not enjoy in the least), to sticking her head in the freezer, to no avail could she get cool, she got now also faced another problem. She was
starting to get thirsty from all the heat, more so thirsty for a sweet drink. That's when it hit her "why not get a cola?" she thought to herself Kimi adored the taste of soda but above all cola was her favorite.

Leaving the discomfort of her room she headed down the stairs and headed for the kitchen, not noticing the slight difference in heat as she mad her way. Peering inside the cold refrigerator her hopeful look soon turned sour with dismay as all she saw to drink was beer, a half of a 6 pack of a sugar loaded lemon lime soda,
and a bottle of a stronger black liquor which she only heard her gracious roommate call Jager. Feeling defeated she eyed over at the soda thinking
maybe her roommate wouldn't mind if she took one bottle of his soda, but then again a cold can she could rub along her skin to help her feel better.
Sighing in bitterness she soon thought about "Why not ask Shad to go and get her some?"

She bolted down the stairs toward the basement and soon enough found her roommate Shadacus in his usually spot on a hot day like so, in
his lab portion of the basement but instead of fiddling with chemicals like usual he was on the phone but with who came to her mind only for a second
she needed some nourishment and relief from the cruel heat. She slowly approached him, not even being 5 feet from him and his lab desk he leaned
his muzzle over the receiver of the phone and mouthed to her as if the other person had super hearing
"What you want?"
"Um c-can you get me?" she started to squeak before she realized there was a couple sodas on his desk and slowly flicked her tail
As if he could read her thoughts he shot at her with "go ahead and take a soda" with that said he spun his chair and turned his back to her without
another moment to spare she took one she saw was already open on his desk, it was cool but not super cold like she hoped for but at this point she didn't care
she rushed upstairs and wandered toward the living room slowly twirling her prize in her hands. She was just entering the living room when she heard Shadacus's
voice call out to her
"Kimi I'm going out for a bit I'll see you in a bit"
She didn't even manage to say a word before she heard the front door slam behind him, not wasting another moment s popped open the soda and started
to guzzle her sweet cola at first it felt cold as it ran down her parched throat liking the feeling she drank the rest of the can in a quick chug. Her ears perked up
as she started to feel an odd sense of warmth through her, like she was submerged in a warm bath. But how she wondered, then she could swear she was feeling
a breeze along her chubby potbelly more so than usual as she looked down her expression quickly changed from curious to horror as she saw her little belly
beginning to grow as well as her breasts lifting up her light blue shirt.