Up until that moment I hadn't really appreciated my sister as a girl. She was only 11 after all and in my mind still a little kid and an annoying one at that! I was 14 and spent a lot of my time masturbating over porn magazines and dreaming of fucking a girl for the first time. That all changed the day I burst into Emma's bedroom.

I couldn't find my new Green Day CD and thought Emma had 'borrowed' it. She often takes my stuff without asking and I was quite mad at her, not just because I thought she'd taken the CD but also because she would have had to go into my room to do so.

I threw open her door ready to ball her out but froze on the threshold at the scene before me! Emma lay on her bed, naked, legs wide open, fingers flicking energetically over her pussy lips. From the look on her face and the way her body writhed on the bed she must have been enjoying it. The scene lasted no more than a second or two before she saw me standing there and grabbed a pillow and covered her nakedness with it. It was too late though, the image was burned into my brain.

"GET OUT!" she yelled. "GET OUT NOW, ROSS!" Her face had gone bright red.

I didn't move. Mostly out of surprise but part of me wanted to see her carry on. I had suddenly realised I had a real girl, here, in my own home and didn't need to look at pictures of unobtainable women and fantasizing. I only needed to persuade her to do what I wanted, which wouldn't be too difficult.

"Mom will be really mad when she finds out!" I put my best 'shocked' expression on to support the statement. Looking back I really don't understand why that tactic worked. I don't remember our parents ever telling us that masturbation or anything to do with sex was wrong but as kids we seem to instinctively know it's naughty and we'd get into a lot of trouble if it were discovered.

"Don't tell mom, Ross!" Emma pleaded. "Please don't?" Her embarrassment had changed to worry and fear at our parents finding out.

"I don't know Emm." I kept a measured tone of shock in my voice. "I've gotta tell mom!"

"NO! Please don't Ross!" She leapt off the bed, discarding the pillow, oblivious now to the fact she stood naked in front of me. "PLEEEEEASE! I'll do anything you want."

Ha! Gottcha! I thought. "Well... I dunno." I hesitated, pretending to be unsure and needing a little extra persuasion.

"Please Ross, anything you want, just don't tell!" Emma was bouncing up and down with frustration. Her pleading, whining voice usually got on my nerves but I was enjoying myself. I shrugged expressively.

"I guess..." I hesitated as though thinking of a forfeit. "Okay... but you have to carry on diddling your pussy and let me watch.

"NO WAY!" She was shocked.

"You said anything." I reminded her.

"That's not fair!"

"Tis fair... if you don't do it, I'll tell on you!" I smiled at her confidently hoping she'd think I was serious. The truth was I wouldn't dare tell mom but my dim sister didn't realise that!

"Your evil!" She moaned, then with an exasperated sigh she turned and flopped back on her bed. "Well, okay but promise you won't tell?"

"I promise." I said as I sat beside her.

Emma lay back and opened her legs. I couldn't believe my luck! There, right beside me, was a girls pussy. I studied it carefully. I was familiar with what they should look like from all the porn magazines I'd seen but Emma's looked neater somehow. Her pussy lips formed little pillows of soft flesh that sandwiched a thin ridge of skin that ran about half way down her crack. Below that the gap between her pussy lips looked moist with a clear fluid. She had no hair yet of course, she was only a kid. In most of the pictures I'd seen the women's pussy's were wrinkly and some had fleshy bits hanging down.

I had developed a raging hard on which was beginning to feel rather uncomfortable in my pants. I watched my sister's finger rubbing languidly between her pussy lips and noted how she concentrated on a point where the fleshy ridge stopped. She rubbed that spot in little circles but occasionally slipped her finger down into the gap between her pussy lips, pushing it in quite a way before pulling out again and returning to her favourite rubbing spot. Her finger came out wet!

When Emma slipped her finger deep into her crack, I saw there was some sort of hole and guessed that was her cunt. I'd seen pictures of guys fucking girls and knew that hole must be very deep if it could fit a cock inside! Emma's didn't look wide enough for a cock. It looked only just wide enough for her finger.

As I watched Emma I wanted to touch her pussy myself. "Let me touch you." I said as I placed my hand between her thighs and tried to push her hand aside.

"NO WAY! GET OFF!" She forced my hand away.

"But you said I could do anything I wanted, remember!"

"Did not!"

"Did too."

"Whatever!" Emma sighed loudly and let go of my hand. I smiled to myself as I touched her pussy lips. What she had said was she'd do anything but my stupid sister didn't realise the difference! I explored her pussy freely, prodding and pulling her nether lips about and having a good look inside. There was a small hole near the bottom of her crack and above there what looked like another smaller hole. There was a small lump tucked below the end of the middle ridge and everything between her pussy lips was wet and slippery. It all looked a lot like the pictures I'd seen but smaller and tidier somehow! I was surprised at how soft and rubbery it all felt.

My curiosity satisfied, I started stroking her slit the same way she had been. I realised she must have been rubbing the small bump thing so I did the same. When I slid my finger further down her slit I found my finger slipped into the hole at the bottom and came out a lot wetter. Not really knowing what I was doing, I got a rhythm going, 5 or 6 circular strokes on the bump then dip the finger in her hole and back to the bump as Em had been doing.

Em started making a "Mmmm" sound and pushed her hips up off the mattress, pushing her pussy onto my finger. I figured she was feeling the same as I did when I stroked my cock. I started wondering if girls could cum like boys?

By this time my cock was ready to explode and strained for release from my pants. There was no way I was going to pull it out in front of Em though! I had to make do with rubbing and squeezing it through my pants.

"Aaaargh yes!" Em gasped. Yes what? I thought as she grabbed my wrist and held my hand firmly between her legs which she clamped shut and crossed, squeezing my fingers into her pussy. My finger had slipped to the entrance of her cunt hole and as she flexed her leg muscles, crushing my hand, my finger got pushed right into her hole. Em bounced her ass up and down on the mattress which made my finger slide in and out of her cunt!

She gripped my wrist with both her hands, digging her fingers in and all the time she was making the "Aaaargh, aaaargh, aaaargh." sound. Wow! I thought, she's cumming! Suddenly I was cumming too and felt my hot slimy spunk fill my shorts. I could feel the finger in her pussy getting very wet and slick. The wetness spread over my hand and Em's inner thighs and I thought girls must squirt stuff too!

Then it was over and she relaxed on the bed with a long sigh. I looked between her legs at her pussy and my hand expecting to see some white slime but there was nothing but clear fluid, lots of it! I pulled my finger out of her cunt and saw it was dripping with the fluid. Guess that must be girl cum I thought!

"THAT'S ENOUGH, GET OUT!" Em's shrill voice was accompanied by a resounding thump on my head from her pillow. "GET OUT, LEAVE ME ALONE YOU PIG!" Her face was bright red from embarrassment and anger. The pillow was making another arc towards my head. I leapt up from the bed but not quickly enough, it caught me on my back with a resounding thud. I staggered towards the door surprised at the depth of her anger! The pillow followed me, sailing purposefully through the air. I ducked just in time and it crashed into the wall, ripping one of Em's Justin Bieber posters off. I scurried uncomfortably to my room conscious of the cold sticky mess in my shorts.

The funny thing was, it turned out my Green Day CD was in my room all along!