I'd just moved into my dorm for my first semester of college when I made the worst mistake of my life.
Given my social anxiety, my older sister, Rachel, and I had decided to room together for my first year.
Apparently most buildings don't allow coed roommates, so we were in an old, isolated building with only a few other people, who were all on different floors. The room itself was alright, the floor was carpeted, so it felt cozy. Unfortunately, there was no AC, so it was commonly sweltering inside, even with a window fan.
Rachel was a Sophomore, and something of a loner. She probably wouldn't have had her little brother as a roommate if she wasn't.
I was just getting settled for the night when she walked in. Her Raven black hair was in a tight ponytail, and she was wearing her exercise leggings and stained plain t shirt. The leggings accentuated her figure, showing off her ass. Rachel had a soft, large butt, round and perky, that barely fit into her leggings. It would be perfect on any other girl, but since she was my sister, I tried not to think about it.
Rachel looks unassuming at first, 5'11, all curves, and a considerable amount of fat in all the right areas. Underneath her soft figure, though, she had a lot of hard muscle, with powerful legs. I would know. Every time we fought as kids (and more recently, honestly), she would win handily.
When she wasn't hitting the gym, she mostly stuck to a more relaxed style, everything from skirts with black stockings to short shorts.
Rachel walked towards her bed, and as she did, I caught a whiff of BO blown towards me by the fan. She was visibly sweaty. Her skin was oily, and I'm pretty sure her leggings weren't quite that shade around the butt and crotch before she started her routine.
"Jesus, you stink. How long were you at the gym?"
"A few hours", she responded. "It's 90 degrees out, of course I'm going to sweat a little."
I just shrugged and began making my bed. Based on her expression, I may have to apologize tomorrow. Rachel has a horrible temper, especially when she feels she's been insulted. Somehow, I'd never learned to keep my mouth shut.
Apparently, she decided the conversation wasn't done yet. The carpet muffled her footsteps as she walked up behind me, and casually put me in a headlock. I started to panic, and gagged from the proximity of her sweaty armpit.
Unfortunately, that only seemed to make her more angry.
"Oh, it's that bad, huh? Why don't you get a nice good whiff."
I tried to choke out a hasty "I'm sorry", but was cut short as she began dragging me to the ground.
Keeping me face up, she shoved my head through the gap between the back of her chair and the cushion. Rachel held one hand on my throat, and slowly walked around the edge of the chair.
Now I really started to panic. Rachel would occasionally sit on my face when we play-fought as kids, and I did not want to become so closely acquainted with it again, considering the sweat dripping down her thighs.
Carefully keeping her strangle hold on my neck, she slowly began to lower her ass towards my face. A single drop of sweat landed on the tip of my nose, and I started desperately flailing my limbs. It was no use. In contrast to Rachel, I never had been very strong. Painfully slowly, she kept lowering herself. Clearly, she was enjoying herself. Seeing the smirk on her face scared me even more.
The skin-tight fabric of my sister's leggings were practically begging for mercy. The seams were stretched to the breaking point, and the back of the leggings were sliding slightly into her buttcrack, giving her a wedgie. I could see her lacy black panties through them.
Seeing Rachel's butt inches above me, I had a flashback of the most brutal punishment she'd ever given me, a few years ago. This was after the incident where her boyfriend broke up with her, and I'd never seen her so mad. She'd hog tied me, taped my mouth shut, and dutch ovened me in her bed all night. One of Rachel's farts could clear a room on a bad day, so as you can imagine, it was a hellish night.
She was fully aware of how toxic her farts would be, and would occasionally weaponize them. Our parents had always kept her in check, though, and she never really wanted to torture me, it was just tough sibling love. Okay, maybe with the occasional punishment, but still.
Back in the present, our parents, or anyone else for that matter, were nowhere to be found. She continued to lower herself, but I was confused to find she wasn't aiming for my face correctly. She suddenly halted above my chin, then quickly removed her hands and dropped the last couple inches onto my throat.
I was taken by complete surprise, and after an initial jolt, I breathed a sigh of relief. I hadn't pissed her off too badly.