Sisters Workout Shorts

My girlfriend and I had been talking about spicing things up recently and decided to take the next step in our relationship by introducing TF stuff into the mix. So one day I decided I would surprise her by turning into a pair of white shorts. I knew she was supposed to be coming by after work, so I transformed on the bed and left my phone next to me with the TF app open on my phone knowing she would easily put two and two together. I texted her to let her know I left her a surprise on my bed and proceeded to transform. To my surprise, when she walked in, my sister was with her. She picked me up with a look of disgust.

"This was his surprise!?" She said sounding somewhat annoyed. "I never wear white! Why would he get me these!?"

"Oh, but those are so cute!" My sister responded.

"Well I certainly don't want them. We're the same size, do you want them?"

No no no, this can't be happening! I tried to yell out and tell her, but being an inanimate object made that impossible.

"Hell yea I'll take them!" My sister replied. "I've been meaning to get a new pair of gym shorts and these would be perfect!"

My girlfriend tossed me to my sister. This can't be happening. If my girlfriend doesn't realize what happened, I could end up stuck like this forever. My sister shoved me into her purse and zipped it up. All I could do now was wait and hope that my girlfriend figured out the situation before my sister had a chance to put me on...

About an hour passed before my sister finally removed me from her purse. We were in the girls locker room at the gym. Panic began to set it. The last thing I wanted was to be used as gym shorts, even by my girlfriend, but especially not by my own sister. All I could do was watch as she stripped down to her underwear. Though I didn't want to look, I didn't have eyes to close, and being transformed I had very little control over any of my senses.

Being stretched over her toned ass hurt as bad as it grossed me out. My face ended up directly in her ass. I couldn't believe this was happening. I kept praying my girlfriend would realize her mistake and call my sister, but the call never came. She made her way out to the gym and began her workout. Now it should be known that my sister naturally sweats a lot more than average, and I was scared to find out how bad it was during a workout.

It didn't take long before sweat covered her whole body and I quickly became drenched in it. to make it worse, the position the machine had her in firmly wedged me inside her ass crack, giving me a first hand taste of her swamp ass. I wanted to puke, but that was an impossibility. Even through her panties, it felt like I was licking her ass.

"Wow," she said as she finished her first set, "these are the most comfortable shorts I've ever worn. It's like they're massaging my ass! I'm gonna have to wear these all the time!"

After she finished on the first machine, she made her way over to the bikes. She sat down hard, crushing my face under her ass and ground me into the seat as she tried to get in the most comfortable position. I can't say for certain how much time she spend on the bike, but from my perspective it felt like a never ending eternity.

Every time she switched from one machine to the next, she would rub her ass, and thusly rubbed my face all over it. I was drenched and beyond grossed out as I fought to keep my sanity through the whole ordeal. I wanted to cry. Hell, I wanted to die. This was the most horrifying experience of my lifetime. I really wished I had thought to set an end time instead of trying to leave it up to my girlfriend.

Finally, after hours of working out, she made her way back into the locker room. I began to cheer internally knowing that my hell was almost over. As she slipped me down of her waist, I got a good strong whiff of her feet as they passed me, and I'll admit, I'm so glad I wasn't her socks. That smell was even more terrible. But then she just left me on the floor, and even stood on me and she slipped off her panties. I could smell and taste her feet as her foot sweat oozed out of her socks and into me. Even as she took the rest of her clothes off she kept stepping on me.

Then she reached down and picked me up, still naked, and began to slide her feet back into me. I couldn't believe this was happening! I was once again forced to watch as she pulled me up closer to her as until once again my face was buried in it. Only this time, she wasn't wearing any underwear, probably because they were to wet for comfort.

"These really are the most comfortable shorts ever," she muttered to herself. "I'm going to have to ask Shane where he bought these so I can get more! I'm going to wear these constantly!"

Then, without warning, her hand came around and her fingers pushed me deep inside her ass crack all the way to her asshole and she began to rub me in vigorously, forcing me to absorb all the sweat that was giving her swamp ass.

"Aaahh, that's better," she said, slapping her ass, sending pain shooting throughout me.

She finished getting changed and then stuffed all her dirty clothes into her gym bag. She made her way back out to the car and sat on my face once again.

"Wow," she said as she sat down. "It feels like these shorts are already dry. They must be super absorbent!"

And she was right. But although I was dry, the taste of everything I went through was still very much trapped within me. There was simply no escaping it. She started up the car.

"Finally!" She exclaimed. "That taco bell that I had for lunch really fucked up my stomach. Now I can finally let loose."

Oh God no! Please no!

PPPppbbbttt!!

A hot fart oozed out of her ass, filling my fabric with a taste and smell much worse than her sweat.

PPpfffbbtt!!

"Wow! These are the craziest shorts ever! I cant even smell my farts, and I know they've gotta be terrible right now!"

 She wasn't kidding. The smell of her farts was the most intense thing I'd ever dealt with. And if that wasn't bad enough, I could also taste it, as though she was farting my nose and mouth at the same time. Again I wished I could vomit. The whole ride back to her place I was blasted with one fart after another.

Right after she got out of the car, she reached back and scratched her asshole through my fabric. After an entire car ride of smelling her ass, now I was once again forced directly against her asshole, which now had a strong taste of shit. She quickly rushed into the house and ran to the bathroom where she dropped me down around her ankles. The smell of her feet was so strong that it permeated through her shoes, so now I tasted and smelled like ass with the scent of her feet wafting all around me.

I wished I could look away, but all I could do was watch as my sister unloaded her bowels into the toilet, filling the whole bathroom with her stench. When she pulled me back up around her waist, I made a terrifying discovery, she was apparently not very good at doing a thorough wipe job and now my face was right in front of her dirty asshole. Once again, she reached back and scratched her ass, forcing me right into the filth she neglected to clean, using me to finish the job. After finishing up in the bathroom, she worked her way into her bedroom where she climbed into bed.

"These shorts feel so amazing on my skin," she said, softly rubbing me agains her nether regions.

Within seconds I felt myself getting wet... Oh dear God!! This can't be happening. THIS CAN'T BE HAPPENING! She rubbed harder and harder, getting wetter and wetter, flooding my fabric with her juices. Finally, she slipped her hand inside me, and then inside herself. There was nothing I could do to prevent any of this. I wished I was dead in the worst way. As she finished, her flood gates opened up and she came all over my fabric. The taste of her juices filling me to the core.

This was the day I learned just how unhygienic my sister truly was, and unfortunately for me, all those comments about wearing me constantly really was her intent. From that day on, when I wasn't in the dirty hamper, I was wrapped snuggly around her ass. Soaking up her sweat, farts, and aroused juices. My life as I knew it was over. I was now and forever more nothing more than a my sisters favorite pair of shorts that she wore on continuum...