I'm practically grown up now. This happened years ago when I was young, 18 years old, sweet and, oh so innocent ... but not for long.
My first introduction to sex, other than fingering myself practically every night in my bedroom, was with my brother. He was a couple of years older than me and obsessed with sex as I guess all boys his age are. I knew he used to peek at me in the shower and try to look up my short school skirts. He was always trying to get me to reach up or down for something so he could get a crafty look.
When I was in the shower I could see the bathroom door slowly open a couple of inches in the mirror. I decided it was about time I teased him a bit more. I started soaping my newly developing breasts and concentrating my fingers on my hard little nipples. Slowly I moved my hands down in between my legs making sure I was positioned so he could see it all in the mirror. I soaped up and down my slit starting to feel those familiar sensations tingling up my body. Somehow it was even more exciting knowing that someone was watching.
As I rubbed myself off I started to get carried away. I started fingering my tight little pussy. My breath started quickening and I knew it wouldn't be long before I orgasmed.
The door had opened a little wider. The movement must have caught my eye and I looked over to the mirror and found myself looking straight at my brother. Game over - we had clocked each other. Give him his due, he braved it out. He walked in, closed the door and stood in front of me, his stiff cock poking out of his dressing gown. "Go on." He said. "Don't stop on my account."
I was stood just staring at his stiff dick, like a dummy.
"Go on, or I'll tell Dad what you were doing. I'll tell him you were showing me on purpose."
He started rubbing his cock as he leering at my naked body. He would tell Dad as well, little sod. "I'll do it if you let me touch that." I said pointing at his hard prick and reaching down for it. He was so shocked he didn't move quickly enough to stop me. I grabbed it and pulled him closer. At the same time I started running my fingers up and down my slit.
I did us both at the same time. Fingering my tight wet pussy with one hand and moving my hand up and down his hot, stiff shaft with the other. All of a sudden his whole body stiffened and he started thrusting his cock forward in my hand. A long gush of cum shot from the end of his prick hitting me on the top of the thigh and my swiftly moving fingering hand. As he sprayed me with more and more of his hot cum I brought myself to a huge orgasm.
I rubbed his cock until it started to go limp. "Wow." I said. "That was brilliant. It's all slippery and sticky".
Brother was not amused and ran from the bathroom muttering something about telling Dad what I'd done.
The next day when I came home from school I was confronted by a stern Dad. "Your brother told me something very bad, Sam. He said you were teasing him in the bathroom and you touched him in a very naughty place."
"Oh, Dad it was just messing around, nothing serious." I whined. I sat down on the chair in front of him, my short skirt riding up my thighs. I noticed that Dad's gaze flicked down to the hem of my skirt for an instant before looking me in the eyes again. A very wicked though went through my mind and I slightly parted my legs.
His gaze shifted again. I thought he must be able to see my white panties now. I shuffled around on the seat making the view even more obvious. Dad was getting a little nervous now, his little girl flashing her panties at him like that. I could also see that there was movement in his trousers. God, Dad was getting turned on.