Elizabeth: Beginnings of a Sissy

I had a pretty good system going. My 18 year old sister would stay up to watch Sex And The City reruns with me (well she watched, and I smoked weed), and during the first ad breaks, would run downstairs and get changed for bed. During the next ads, I would go to the bathroom, and on my way, raid her hamper for her fresh dirty panties, usually buried under the rest of her clothes. Then, I'd wear them and masturbate into them all night and the next day, then I'd do it again, mixing her old ones back in for her new ones. By the time a wash was done, my interference was gone, and she never missed a pair. I was pretty much her size, so I wasn't worried about stretching.

Sometimes, if I was particularly horny, I'd steal one of my mom's tampons (my sister wore pads) and wear it up my ass for hours, even days. Then one day everything changed.

When I went for her hamper, her panties were sitting on the very top, something that never happened. I always had to rummage for them. And not any panties, but her light pastel blue thong, the only one I loved enough to break my one day rule for. Why, two weeks ago, I wore them for four days, and had to wash them with my stuff, and subtly mix them into her dryer load. If she loved them as much as I did, she would've noticed their absence from the wash, and sudden appearance after drying.

I took them from the top, hoping she would've forgotten she put them there, and immediately felt their wetness. I smelled them... not piss, but girlcum. Okay, it was a particularly hot episode, and she was a year younger than me. Of COURSE she masturbated too. That night, I came in them four times.

The next day I expected her to say something, or tell mom, but nothing. After work, I replaced her thong, and that night there was another pair on the very top of her hamper: this time a white/pink full crotch cotton bikini thing, and was not only wet with cum, but still a bit creamy, and a few light haired pubes. That night I went to bed early.