Rolling The Marathon

Nadia looked behind her.  "Phew, she's not here." she thought to herself as she rumaged through the pantry.  The peckish cat girl was looking for a snack she could easily eat while running a marathon.  The past few months had been filled with pranks being pulled on her and she needed some stress relief.  Nadia found an old box of granola bars.  The box was marked "Nadia don't eat these.  They are for special occasions.".  "Perfect." she said ignoring the note left by her prankster roomate.  Nadia took a bar out of the box, got in her car and drove down to the marathon starting line.
After getting changed into her sports tank and running shorts, the neko girl strolled to the starting line.  Her bust bouncing with each footfall attracting the attention of participant and bystander alike.  She took a bottle of water from one of the complementary stands and sipped it.  "Runners!!!  On your marks..." the foreman said holding up a flare gun, "get set,".  Nadia crouched down in the starting position, her generous bust squished together by her seemingly small top.  "Go!!!" the foreman shouted firing a single flare as the runners all sped off.  
Some time later, Nadia had gained a sizable lead.  She could hear none of the other runners behind her even with her advanced sense of hearing.  The cat girl decided to take a short break.  She pulled the granola bar out of her pocket and munched down on it, finishing the treat in two bites.  She finished her water bottle, completely oblivious to the blue spots forming all over her body.  The brunette began to run again to regain her lead.  She froze from a sudden pain.  She looked down to the source of the unpleasant sensation and saw not only that her belly had blown up to the size of a beach ball, but also that it was blue and still expanding even as she held it.  Her arms and legs thickened as she observed them.  Her breasts and ass began to blow up too, causing little holes to appear in the seams of her sports tank and running shorts as her boobs and butt grew.  Being reduced to an amorphous ball, Nadia suddenly lost her balance and toppled onto her side.  Her arms and legs were slowly devoured by her growing mass as she tried to struggle against the expansion.  The neko girls running shorts exploded off her as the shoulder straps of her sporty tank top snapped, leaving the garment a constricting vice.  Nadias cheeks blew up to the size of cantalopes, limiting her speech to muffled pleas for help.
Holes appeared in the front of the nekos top, torn into existence by the ever-growing balls titanic tit growth.  "Please not like this!!!" Nadia thought grimly fearing the worst possibility, "Any way but this!!!".  She closed her cat-like eyes in fearful anticipation.  As quickly as it had started, the expansion ceased.  Nadia opened one eye and then the other.  She flapped her hands and kicked her feet in the divets they had created on her nearly spherical body.  Her body had become stupendously sensitive to touch, as each time her hands met the sides of their divets she felt sudden shocks of pleasure resound within her being.  Brought to orgasm several times, a sweet smelling liquid began to leak from her mammothly mammaries, and nether-lips as she came.  After several minutes, her ears perked up as she heard the rapid rapping of running feet.  "Why me?" she asked herself in thought as she heard them round the corner and gasp at the size of the formerly fit cat girl.

The End

Here's Nadias part in my OC Blueberry Bonanza.