I opened my sister's Sophie's bedroom door. Very quietly, without knocking. It was only 4:00pm and she was in bed, with the sheet pulled up over her head.
A few minutes previously, my mother, or rather, our mother, Sophie's and mine, had taken me aside. "Simon, I'm really worried about Sophie."
"About the internet bullying stuff?" I guessed.
"Yes. I don't understand it, she's eighteen, in her final High-School year. I would have thought girls her age would be over this...rubbish. She'll be joining you at University next year, well that's if she gets her act together and stops fretting over the nonsense stupid girls write on Tweeter or whatever-it-is. Would you talk to her? Please?"
I moaned. "What can I do? I'm no expert. It's girl stuff."
Mother clearly was very concerned. "Just try. Try anything. Sophie won't talk to me. You're only a year older than her. You might get through. I've got to go; an appointment with one of her teachers to see if I can get to the bottom of it. So while I'm gone try to snap her out of it. She's very fond of you, you know."
I heard mother drive away, so called softly "Sophie...are you...sick or something?"
"Get lost!" came from inside the sheet/tent.
This wasn't going to be easy. I decided on what, in hindsight was a pretty stupid plan of action. First my strategy backfired painfully, then it actually worked, and finally it had a very happy ending.
The essence of my plan was that if Sophie got angry she might, in Mother's words 'snap out of it'.
So, I went over to her bedside and started shaking and pushing her and lightly slapping at her legs.
I jeered at her. "Wake up to yourself you stupid bitch!" Shake shake "Come on! Enough of this bullshit! Those fuckin' mean girls aren't worth a pinch of shit! Push shove. Why do you care what they think?
"Don't do that Simon. Leave me alone!" Sophie sobbed.
My plan wasn't working. Did I change tactics? No.
"You're a fuckin' idiot!" Slap slap. "Get angry! Fight! Don't take that crap lying down!" More slap slap. Harder. "You're as weak as piss!"
"Stop it you bastard!" She was getting angry. At me. "Do that again and I'll kill you!"
"I'm not stopping until you come to your senses!" I was positively shouting at her. "Mother says I've gotta sort this out." Harder push. "You need to have a go at them, scare them off." I guessed where her bottom was and gave it a brisk smack. "Hiding in bed is for losers! You're a fuckin' loser!" Smack smack.
I grabbed the pink frilly sheet and pulled hard, dragged it right off the bed and tossed it aside. Sophie was in her usual night attire, a long tee-shirt-nightie. This one pink to match her sheets. Her face was pink too. With rage. She swung a vicious open handed slap at my face. It connected with a mighty crack that rang in my head like a thunderclap. The shock, the pain, stunned me. Tears blinded my eyes, but I managed somehow to grab her wrists to prevent her from slapping me again. It didn't help much. Sophie was fighting like a cornered animal. She bucked her lower body and lashed out with one foot then the other. Her first kick ineffectively glanced off my hip. Her powerful athletic movement caused her night-shirt to hitch up around her waist. She wasn't wearing any panties. I blinked my tears away, for a better look. I forgot to protect myself as I got a good eyeful of the cute little cleft at the bottom of her belly. That was just before her second, harder kick got me right in the guts. Winded me. In desperation I clung to her wrists and threw my weight on top of her. She bounced and heaved her half-naked body against mine. My cock responded instinctively. The memory of what I had just seen and the feel of her frantic movements under me triggered some primitive responses and soon my hardness was jammed between us. For minutes we wrestled on, Sophie eventually weakening, thank God.
"Can I let you go now?" I asked when her struggles finally subsided.
She nodded. I gingerly eased off her and while I still held her wrists took a good long look at her pussy. It was a tiny smooth slit in her puffy mound; the light dusting of reddish hair didn't hide a thing. I released her and stood, she moved up the bed, leaned against the headboard and pulled her shirt down so it just covered her. We were both breathing heavily. Me from lust as much as from exertion.
"So," I said, embarrassed now. She must have felt my erection. Must be able to see it now, tenting my track-pants. Must know I stared at her naked pussy. "If you fought those morons like that they would run a mile. Never bother you again."
"Alright. Alright." She said, still angry. "I get what you're saying. I'll slap one of them. Hard like I did to you. Frighten shit out of them. How's that?"
I grinned. "Perfect. You'll see. It'll work a treat. They'll leave you alone. I'm sorry I roughed you up. It was my crazy way of helping."
Sophie nodded and looked away. "I'm sorry too. I hurt my hand when I hit you. It must've hurt you a lot. But you made me so angry."
"Guess I asked for it." I shrugged, looked at myself in her dressing-table mirror, and touched the red hand print on my cheek.
She hung her head and blushed. "When you...stared at my...down there, and then when you were on top of me... I was kinda scared you were going to ...rape me."
"Oh no Sophie!" I denied, "I wouldn't do that. I'd never really hurt you. I love you to bits."
"Yeah but..." she argued, "I do really know you wouldn't, but when I felt your big hard thing pressing on me..."
"Sorry. I couldn't help it." I rationalized. "You're my sister, I know, but you're also a very pretty girl and I'd just seen...what I shouldn't have seen. Turned me on."
She looked right into my eyes and grinned. "I know what you mean. I got really turned too. It was like a rape fantasy. Made me wet." She pressed her hand to her barely-covered pussy, then lowered her gaze to my bulge. "Looks like you're still turned on."
I grabbed myself. "Mm, I s'pose I am."
I reckon we were both thinking the same thing. Wondering where we dared to go with this. We were home alone, in her bedroom, not wearing much, both admitting to being sexually aroused, and both touching our genitals. It was so wrong but felt so good. I moved my hand, a couple of tentative rubs. Sophie did the same. I was trembling with many emotions. Desire. Anxiety. Fear of...what? Of offending my precious sister?...Of being caught doing whatever it was we were doing? Or going to do? My legs felt weak. I sat down on the bed. The two of us rubbed a bit more, each watching intently what the other was doing, out of lustful curiosity and also to be sure we were both participating equally. As Sophie's rubbing became more vigorous, the hem of her shirt jiggled tantalizingly close to baring her pussy again. I couldn't take it any longer, so with my free hand I tugged the shirt up a bit, fully exposing her again.
"Simon!" She sounded offended, but made no move to cover herself.
I stood and shoved my pants down to my knees, allowing my cock to swing free. "Only fair." I said, hoarse voiced.
Inhibitions flew out the window. We each had our eyes on the others' hands and what those hands were doing. We masturbated with increasing urgency, each enthralled at seeing something neither had ever seen before. Sophie brought her both hands into play, teasing her slit open, until the inner lips blossomed like the petals of some exotic pink orchid. She tickled a fingertip in and out of the darkness of her depths.
I was about to cum. Should I tell her? Yes. "Sis...I'm gonna cum."
"Wait for me...I'm nearly there..." she croaked, breathless.