"All right... what weird thing are we testing today?"

"Havn't you heard Sammy? It's paw day! So I'll skip all the science bits and blah blah. We're testing a paw growth potion!"

Samantha blushes. "A-a what? I mean... haven't you made dozens of them already?"

"Yeah... But, this is a different formula, easier to make and less ingredients and what not. So, yah know, we have to make sure it works"

Samantha, still blushing and knowing that this was going to happen one way or another, puts her feet forward to Katherine. "F-fine... j-just, get it over with" she finally says with a sigh.

Katherine chuckles, and without hesitation, takes a prepared bottle of glowing blue liquid and puts it slowly on the shark's paws, careful not to make a mess. The strange liquid was warm, and oddly disappeared before reaching Samantha's heels, as if the liquid never existed.

"Uh... so, how, how potent is this stuff?"

"That's why where testing it first. But don't worry, I'm sure you'll have perfectly massive stompers~"

And almost like it was by triggered by her last word, Samantha's paws give a gentle throb, a slight pulse of about an inch for a brief second before shrinking back down.

"O-oh nmmmh~" Samantha starts, but is cut off as her paws give another, larger pulse, gaining a good 7 inches, but only shrinking 5. Then they pulse again, and again. Her feet now rapidly throbbing like a heartbeat, each one bigger then the last, every few inches staying on her swelling feet. Samantha couldn't help but gently moan, though she pretends to hate it, she always loves the feeling of her feet growing. And before she knew it, her paws dwarfed her in size. Though surprisingly light, it would be near impossible to walk with these.

"J-jeeze Katherine! M-maybe next time u-use less!" She says with a stutter and a hard blush, mesmerized by her huge puffy toes.

"Oh hush, you love it~" Katherine says, kneeling by one of Samantha's newly overgrown paws.
"Now we can celebrate today properly!"
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This was commissioned by   FluffyEevee40

I originally got this to celebrate Paw Day 2020. But fun fact, I actually didn't know about it until the day of! Crazy huh? Well that's why this was a bit late for the holiday, but regardless, here's some big paw fun between my two girls~

Part 2: https://www.furaffinity.net/view/36745308/

Characters belong to me
Art belongs to   FluffyEevee40