I was lying on my bed dressed only in shorts, looking at a 'top-shelf glossy magazine'. The pictures were full colour and very explicit. My hand was inside my shorts, gently rubbing my hard cock in preparation for a good wank, when suddenly the door burst open. In a flash I'd withdrawn my hand and looked up to see my younger sister standing there, fresh out of the shower, wrapped in a fluffy bathrobe and towelling her hair dry. I quickly thrust the magazine to one side.
"Have you nicked my Ipod?" she yelled.
"No!" I answered, angry that she'd burst in on me, something she doesn't usually do. "I have not!"
"Well where is it then?" she demanded. She peered at the magazine.
"Oh! Admiring the female form, were we?"
"So what!" I said crossly. "Perfectly normal for someone of my age!"
She looked at my shorts. My erection, dwindling now at the shock of her bursting into my room, was still very evident.
"Must be a good mag!" she commented. She stepped into the room and picked it up before I could stop her. Retreating out of my immediate reach she scanned the pages.
"Mmm! Big tits!"
"Sis!" I reproached her.
"Oh, shut up! What am I supposed to say? Mammaries? Boobies? Breasts? They're big tits!"
She leafed through a couple more pages and stopped with a gasp.
"Oh! Not only tits!" She peered closely at the page. "No wonder you've got a hard on!"
"Sis!" I expostulated. "What's got into you? You're not supposed to say things like that!"
"Oh shut up!" she said again. "Don't be such a prude!" She turned more pages, looking at the pictures closely. "If you can look at tits and cunts in a glossy magazine and have a wank over them, I can say whatever I like!"
I raised up on one elbow and stared at her. She'd never talked this way before. At least not in front of me. Maybe with her friends. She got to the last page and looked at me over the top of the magazine.
"Not that impressed with any of them," she said. "One or two nice pussies and a couple of decent titties but none that does anything for me."
I lunged for the magazine and succeeded in wrenching it from her grasp.
"They're not
supposed
to do anything for
you
!" I pointed out irritably. "They're supposed to do things for boys and men!"
"How do you know?" she pouted. "I might be a lesbian!"
"Sis!" I exclaimed again.
"Alright, I'm not," she admitted, "but I might have been. Anyway," she eyed my shorts again significantly, "you obviously liked one of those bodies. Or more."
I was trying to think of a suitable put-down to this comment and send her packing when she stepped back to the doorway, undid the bathrobe and opened it wide.
"Does this body do anything for you?"
My mouth opened to speak and remained in that position. I stared at her in total shock and amazement.
"Sis!" I eventually gulped. "What the hell are you doing?"
"Showing you my body!" she answered impatiently. "Do you like it? Does it do anything for you?" She thrust her hips at me suggestively. "Does it turn you on?"
My sister is twenty. Just. I am two years older. Of course I'd seen her wearing all sorts of clothes as we grew up together. Shorts, bikinis, tight jeans and cropped tops, miniskirts, the lot. A part of me had occasionally remarked to myself that she had a terrific figure and often looked quite sexy, but the 'brother' part just dismissed this as an idle observation and I had never, ever, thought of my sister in a sexual way.
Now she was parading in front of me, blatantly showing me her body, or most of it, in an obviously provocative way.
She had on a flowery, thin, almost see-through bra and skimpy panties so she wasn't completely naked, but if anything, this made it worse. Her breasts, I realised now, were beautiful;- round, firm, thrusting up without any support from the bra. Her nipples were taut and thrust out, pushing against the thin material of the bra. It certainly wasn't cold in the room and at the back of my mind I thought, so she must be aroused. I could clearly see her aureoles, large, dark and round. The thin panties hid just enough to be completely erotic. I could see the line of her lips through them, and a dark area which could only be her cunt itself. Her fresh, young, soft skin showed through the material, and I realised with yet another shock that she was shaved smooth. Her love mound showed as a soft bulge at the front of her pants. Her body was lithe, her legs, I already knew, were long and tanned and very sexy. All in all she was a vision, a sexy, enticing, temptress with a body a man could die to hold and touch and be inside.
And she was my sister.
The vision had its effect. My erection immediately returned, stronger than ever.
She looked at my shorts as she continued to dance in front of me, thrusting her hips to and fro.
"Yes, I see it does do something for you. Quite a lot, in fact!"
"Sis!" I managed to say after swallowing a couple of times. "Stop it! What do you think you're doing? Cover yourself up!"
"Prude!" she said again. "What's the matter? Embarrassed? You've seen me in a bikini before. What's the difference?"
I swallowed again. My mouth was dry. "The difference," I said awkwardly, " is that you're.....you're--" I gave up and waved a hand at her to signify the dancing and erotic movements she was making. "And I was already --"
"You were already hard from the magazine," she interrupted. "Ready to have a wank, masturbate, give yourself a handjob."
