The night it happened I was baby sitting or at least I was home with Alice, my ten year old sister, and our mother was out. I'd got a hot new video from a friend and was looking forward to watching it in peace. Allie was upstairs doing whatever it was she did when I wasn't allowed in her room.
I took the video player up to my room and hooked it up to the TV. Then I settled down to an hour of private pleasure. The video left nothing to the imagination. A pretty young girl, about the same age as Allie with a man old enough to be her father who was trying to persuade her to take off her panties. She appeared reluctant, shaking her head and retreating away from his reaching hands. Then he grabbed her and she was left with no choice as he tore her flimsy panties from her slim body and pushed her to the floor.
She shook her head as he forced her slim legs apart and positioned his erect cock between her thighs.
My own prick was rigid with excitement and I was stroking it through the material of my jeans. I'd just reached for my zip when I heard a faint sound behind me. I turned quickly to see my little sister, my innocent baby sister staring entranced at the action on the screen. I grabbed for the remote and stopped the tape but it was too late.
"Wow! Where did you get that from," she said without a trace of embarrassment.
"Mind your own business. It's not for little girls," I said trying to hide my embarrassment at nearly getting caught with my cock in my hand.
"I'm as old as she is," she pouted, pointing at the screen. "If she can be in the video, why can't I watch it?"
"Because she isn't my little sister - anyway I didn't invite you. You're supposed to knock, remember?"
"I did knock. You were just too excited by your dirty video to hear me."
"I was not excited," I said blushing hotly. "You must have knocked very quietly and I didn't say you could come in anyway."
"You looked excited, the way you were stroking yourself."
I looked at her in embarrassed astonishment but she didn't look the least bit concerned.
"What do you want?" I asked resignedly.
"I want to see the rest of it," she complained. "Let me stay and watch it with you."
"Not a chance - you're too young," I told her firmly.
"I bet mum doesn't know you're watching stuff like this. Or that you play with yourself." she added virtuously.
I stared at her innocent face and wide open eyes, trying to decide if she was threatening me.
"Dont worry - I won't tell her," she said softly. "But please let me watch it with you. I don't mind if you want to play with yourself."
The thought of my little sister watching a sex video with me was quite exciting. She was only ten but she was pretty and petite, a cute kid with enormous eyes that captivated everyone. I was still horny as hell and I couldn't stop my eyes wandering down to the outline of her baby tits pushing against the thin cotton of her T-shirt. They were still only the size of apples but they looked bigger because she was so tiny - the top of her head only came up to my chest. Although she still pretty much looked like a little girl, she suddenly looked very sexy. Her little nipples thrust against the material and I could tell she wasn't wearing a bra.
She was more attractive than the girl in the video. I had never thought of my sister in a sexual way before, but I suddenly realised that she was almost a woman now that her body was starting to take shape and the idea of jerking off while she was in the same room suddenly excited me. I knew that I had to convince her that it was me doing her a favour or she'd have something to hold over me for life.
Finally, I said, "Okay you can watch it with me but you have to do what I tell you to do."
"Okay. What do I have to do?"
"Go and get ready for bed in case Mum gets in early, then you can scoot to your own room quickly."
"Will you rewind it to the beginning while I'm gone?" she said eagerly. "If you're quick. I don't want to hang about all night."
"I won't be long," she said as she jumped on my lap and and kissed my cheek.
She wriggled excitedly as she wrapped her slim arms round my neck. The pressure of her firm little bottom on my still hard penis was immediate. I was sure that she must be able to feel my rigid prick pressing into her but she gave no sign of noticing. If anything she squirmed herself a little deeper into my lap and my prick pushed harder against her.
I reluctantly pushed her off and told her to get a move on. She was back in minutes. The nightie she was wearing wasn't much longer than her T-shirt had been and it was obvious that she still wasn't wearing a bra.
I started the video and sat next to her. She had stretched herself out face down on the bed. Her legs were slightly apart and bent up at the knees. Lying on her stomach with her feet in the air, her nightie was short enough that I could see the smooth white of her inner thighs. I rested my hand casually on her slim leg, just below her knee. She glanced round at me but she said nothing.
Her eyes were glued to the television screen though occasionally she flicked her eyes to my face to see if I was watching. I was watching okay but when she wasn't looking at me, I was watching her... and getting hornier by the minute. I tried to remind myself that this was my little sister and she was only ten years old but all I could think of was doing to her what the guy was doing to the girl in the video. I knew she'd never allow it but that didn't stop me from dreaming about sinking my throbbing cock into my little sister's baby cunt and fucking the life out of her.
I moved my hand to rest lightly on the soft flesh above her knee but she was too lost in the video to notice. When I slid my hand to the inside of her thigh and gently squeezed, she didn't pull away or tell me to stop. My hand trembled slightly as I began to slowly stroke the soft flesh of her inner thigh, just above her dimpled knee. She was clearly excited by what she was seeing on the video. Her innocent young eyes were open wide and her breathing was shorter and faster. I moved my hand a little higher until I was stroking the silky smooth skin halfway up the inside of her thigh.
"Aren't you going to play with yourself?" she asked innocently.
"Not at the moment," I replied.
She shrugged. "I thought you wanted to."
"Don't you want to?" I said.
"What? Play with myself or with you?" she asked with a sweet smile. "I can play with myself any time."
"What does that mean?" I asked, shaking with excitement. Was she saying that she wanted to play with me?
She didn't answer, pretending she hadn't heard me. She paused the video to study a scene that had an adult man with a girl that looked about her own age. The man had his cock half inside her hairless cunt. The young girl had her eyes closed and a look of ecstasy on her pretty face.
"Wow, he's so big. How does he get it in there without hurting her?" Allie asked in amazement.
"Well, the girl's cunt stretches and lubricates when she gets excited." I told her, staring at the shape of her cute, round bottom beneath her nightie.
I looked down at Allie's blushing face to see her staring with fascination at the throbbing bulge in my shorts.
"Is your thing as big as his?" she asked.
"I doubt it, he's a lot older than me," I admitted, "but it's big enough."
"Can I see your thing?" she asked. "It looks big."
"It's not a thing, it's a cock," I said bluntly. "You have to say cock."
"I can't say that," she blushed.
"You promised to do as you're told, so you can start by saying cock.
Haven't you ever seen one in the flesh?"
Allie blushed an even deeper scarlet. "Not really," she admitted. "A couple of guys from the senior school tried to show me but I was frightened and ran away."
Smiling shyly at me, she lowered her eyes for another glance at my lap.
"Is that why you want me to jerk off - so you can watch?"
She nodded eagerly. Her eyes were glued to my crotch. "I know you won't do anything to hurt me, I'm sure that I'm safe with my big brother."
I felt guilty listening to her trusting voice - I wasn't sure at all that my little sister was safe with me. Slowly and teasingly, I showed her bulge of my hard dick pressed against the thin cotton of my pants. When I looked up at Allie, I was surprised to see a thin film of sweat on her upper lip. Her eyes were protruding as she stared at the quivering outline of my member.
"So what do you say sis?"
She hesitated and caught her bottom liave to?"
"You have to do what ever I tell you - remember?"
She nodded, "I want to look at your hard cock, Rick."
Excited by my little sister's language, my prick was hard as a crowbar and was feeling painfully constrained by my pants. Although I was really tempted to get back to exploring between her legs, my cock was jumping at my sister's suggestion.
"You have to uncover it, if you want to see it," I told her.
She lost no time, quickly using both hands to pull aside my pants to release my pulsing ramrod..
She grinned excitedly and said, "Can I touch it? I want you to let me feel it and make it squirt its stuff."
I nodded and said, "Okay, but I'm going to touch you too."
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