I was home after a day at college, getting dressed to go to an early evening aerobics class at the gym. I slid out of my denim jeans and pulled a pair of black spandex shorts over my white g string cotton panties; pulled off my jumper and put on a black halter top over my bra. I went to brush my hair in the bathroom, when I noticed the door was shut. I opened it to go in not thinking much, when I saw Jeremy, my 18-year old, younger brother's friend, sitting on the toilet, with his jeans bunched up at the bottom of his legs. He had his eyes closed and was leaning backwards and he had his hand furiously pulling up and down his cock, which was erect. In front of his legs there lay a Penthouse open, with a naked woman lying back with her legs spread open wide.
I was shocked and about to quickly retreat backwards, but I didn't. I stared on at him as his hand grasped his shaft and pumped it up and down. I saw his balls floating underneath his hands as he stroked his long hard penis furiously. I could see veins protruding up the side of his cock, the head swollen and red. I instantly felt horny watching this. I backed up a bit so that he would not notice me perving at him. I then noticed that he had a pair of my panties; the light blue satin g strings in his hands and was holding it in front of his nose. He must have got it from the laundry basket next to the toilet basin. I think I wore them to gym the day before. I felt my pussy getting damp and my nipples awakening.
He continued to pull up and down and up and down on his penis and then he stopped. I quickly backed out and moved around the door opening and back into the passage. I realised that I was hot and sweaty and quite turned on by the scene I had just witnessed. I went back into my room to get my gym bag and started to head out of the front door.
Jeremy was in the passage. He waved at me "Hi, you going to gym?"
"Yes," I answered, but couldn't look at him directly.
I felt myself floating as I glanced away from him and headed out.
I turned around as I went out the front door and there was Jeremy staring at my ass, which was encased in the form fitting tight stretchy spandex shorts.
I could not concentrate during the aerobics class. My mind kept on wandering back to Jeremy and his erect penis with its glistening head and redness. I was so turned on.
On my way home from gym as I was driving I could not resist the burning throbbing tightening seated deep in my vagina. I put a finger over my spandex shorts and lightly directed my index finger to my pussy. I stroked my labia gently only to awaken a wild lion inside me. I struggled between my urge to open my legs wide and keep my foot on the accelerator. I found my clitoris under the shorts and I twitched my finger in up and down strokes, pushing a little deeper into the incredibly sensual sensations pulsating from it with each stroke. It felt enlarged and was swollen, obviously from excitement-something like a concentrated nerve ending.
I rubbed more and more. My legs were as wide as I could open them while driving to take in my fingers. My pussy was damp and a clear wet spot appeared in my shorts. The spandex was restricting. They were too tight to create an opening on the side. I went for second best and I pushed my finger into the spandex covering the entrance to my pussy. The spandex gave but I could not get deep enough. I was excited to a point that I nearly pulled the car to the side to stop and masturbate myself to climax without interruption. I was nearly at home, so I instead went for the last leg. I pushed my finger against the spandex. I was now soaked and I felt the wetness penetrate the stretchy material. I had reached home.
I got out the car and pulled at my shorts as I stood up. The material had formed a second skin against my torso outlining the shape of my pussy lips. I pulled at the spandex in an attempt to hide it, and I quickly ran to my front door. I was still at a peak of sexual excitement and my focus was to get somewhere private and finish off the job.
I ran up to my house charged with adrenalin and a full tank of exploding hormones. I opened the door and was about to run to my room when. Bang! I crashed right into Jeremy. I knocked him so hard that he went flying down the stairs. Shit, I thought to myself.
"Are you ok Jeremy?" I asked him.
"Not sure, I think I've hurt my foot." He said as he lay at the bottom of the stairs.
I had knocked him off balance and he fell down the stairs. His jeans were torn around the knee and his knee was badly grazed and bleeding.
I forgot about my sexual escapade and had to attend to the injury I had just caused.
"I'm so sorry. Can you get up?" I asked Jeremy.