Consequences of Pranking My Sister by jasperspen,jasperspen

“Do you think it’s funny now then Chris, you prick?”

I realised that she had come in quietly, the bowl filled with snow, and tipped it all down my back.

“Look at the mess,” I shouted at her, “I know you were annoyed, but you didn’t need to go that far, it was just a harmless joke I played on you.”

“So was mine,” she retorted, “and it’s not ‘were’ annoyed, I am still fucking annoyed.” she added.

“I should get you for this,” I said.

I was mad with myself partly because I had let my guard drop and also because she had upped the ante and caught me out properly.

“Oh yes?” she said, raising one eyebrow, “you think you are man enough?” she challenged.

“Any day,” I replied.

“Just try it,” she said, putting the bowl down, but keeping her eyes fixed on me.

I could see she had changed into a soft, grey jogging top and from the little I could see, matching, tight, leggings.

Not giving her the chance to be prepared, I shot around the sofa in an attempt to grab her and show her she wasn’t a match for me. Embarrassingly, I wasn’t even able to touch her as, fast as lightening, she jumped over the sofa, bounced off the cushions and stood up where I had been standing a moment earlier.

“Not got any better moves than that then?” she taunted me, picking up my very wet T-shirt and shaking it at me, flicking drops of icy water onto my bare top.

We moved round the sofa, mirroring each other until we were back where we started. We circled around again, but I couldn’t get close to her.

I wasn’t going to give up and let her win, but I was out of ideas how to get any advantage, when a thought popped into my head. While she was watching for the tiniest movement, I used the oldest trick in the book. I let all the tension go out of my body, stood up straight and pointedly looked at the open door that was behind her with a surprised expression on my face, as if someone had appeared there.

On a reflex, Julie turned her head to look and see who was there.

Quickly, so as not to lose the moment, I jumped onto the sofa cushions, leaned over, and grabbed Julie by the waist and before she had a chance to recover, hauled her bodily over the low back of the sofa and onto her back on the cushions.

I reached for her flailing arms, caught one of them, and at the same time swung one leg over her body so that I was sitting on the top of her thighs.

“Get off me you dick head,” she shouted.

“Not a bad move for a ‘dick head’ then after all? I asked, bathed in the glory of my own prowess.

“Just get off,” she said.

“Oh no, you gotta say the word first to show that I have won,” I answered.

“I am sure you’ve regressed to childhood,” she said, scathingly, as she struggled to free herself, “we don’t play these silly games anymore.”

“It looks like we are,” I said.

She struggled more and tried using her free hand to push me off her. She was strong and was almost dislodging me, so I leaned forwards and put more weight on her heaving pelvis with mine. The tight leggings that she had put on were moulded to her firm body and as she shifted, pushed, and twisted, I became aware that my cock had begun to grow and was now firmly in contact, although through our thin clothes, with her mound.

The more she struggled and lifted her bottom up and down, the more it stimulated my sensitive appendage. In all the times we had fought and wrestled, nothing like this had happened before.

Oh my God, I thought, I’ve got an erection pushing against my sister. What will she think, she is already annoyed, she’ll probably never speak to me again. I tried to think of something ordinary or boring to make it go down.

I am fairly sure that in the beginning, she was so intent on getting free and turning the tables on me, that she didn’t realise how our parts were rubbing together. I wasn’t sure what to do, as it was her movements and not mine that were causing us to almost dry-hump.

I first noticed her expression flow from concentration trying to get free, to puzzlement, confusion, and then realisation. I also noticed less of a struggle and more experimental movements of her hips.

I was just thinking how to get out of this situation, when…

Julie stopped moving.

When she stopped, my hard cock came to rest in the dip between her thighs, the head pressed firmly by my weight, against where her pussy would be.

“Chris, is that what I think it is, sticking into me?” she asked, almost unbelievingly.

“Err, I dunno, what do you think it is?” I tried to brazen it out but felt my face reddening.

“It feels to me like you have a hard-on for your sister, you pervert,” she spat.

“It’s not my fault,” I said, trying to defend myself, “it just sort of happened.”

“What do you mean, ‘it just sort of happened’?” she asked, sarcastically, but made no effort to move.

“Well, you know, a man, an attractive girl… I am sure I don’t have to spell it out,” I said.

“But I’m your sister,” she said, “are you telling me you find me sexually attractive?”

“Of course you are attractive, but I didn’t mean that I have been lusting over you or anything,” I said, feeling somewhat embarrassed and trying to distance myself from my uncooperative rigid cock.

“It doesn’t feel like that to me,” she said, the expression in her eyes seeming a little softer, and she still hadn’t tried to move.

“If you say ‘uncle’ we can end this now and forget it happened,” I offered, thinking that it would be a face-saver all round.

“Oh no, I don’t think so,” she replied, a mischievous glint forming in her eyes, “lets see how much of a macho man you are and who ‘chickens out’ first shall we, pervert.”

With that, she began to move her hips slowly up and down, resulting in my covered cock rubbing along the top of her clothed mons and perhaps her clit.

“What are you doing?” I asked, a bit shocked at the direction this was taking.

“You’ll have to work it out,” she said, “unless you want to call ‘uncle’ now of course?”

It seemed neither of us were prepared to be the one to give in just yet. I didn’t know what the rules were and wasn’t about to ask, but I could see that she had lost that angry look and was showing signs of a different sort of excitement. How far she was prepared to take this spontaneous new game I had no idea, but with my mind in turmoil at how this was evolving, I just let her lead.

While she was pre-occupied, I had taken the opportunity to grab her other wrist, so that now I had both of her hands pinned to the sofa each side of her head, my legs either side of hers and pressing my hips down on hers to try to immobilise her. However, immobilised she wasn’t, as she certainly had some core strength in her slim frame and was still able to lift me a couple of inches, even though I was pressing my weight down on her.

She continued to look directly into my eyes, challenging me to call a halt, but also daring me to continue.

Her movements were more subtle now and I wasn’t sure if this was a ruse to lower my guard or something more. She was certainly stimulating my hard cock with these gentler movements, and I wondered if it was doing the same thing for her.

“I don’t think we should be doing this,” I said, getting even more embarrassed at how much it was getting me worked up.

“So, you admit defeat then? You can stop anytime by saying the word,” she said, in a huskier voice than before, and stopping her movements.

“That’s not what I said.”

“What are you saying then?” she retorted, the corners of her mouth just lifting with the suspicion of a grin.

“I just think you seem to have us playing a weird game and I don’t know the rules.” I replied.

“That’s because there aren’t any,” she giggled, “except that the first one to say, ‘that word’, loses.”

I think I was beginning to understand that this was about brinkmanship. Which of us would reach the limit of our comfort zone first and give in. I hadn’t ever contemplated anything sexual with my sister, and now here we were, clearly competing for who would let it go the furthest. I believed she wouldn’t let it go too far; she also had never given any hints that I figured anywhere on her sexual spectrum.

With that thought in my mind and her movements beginning again, I decided to step it up a notch and see how she reacted.

I waited until she relaxed into the cushions, then quickly slipped one leg over and in-between hers. She wasn’t ready for it, and her legs opened easily against the pressure. While she was still making sense of that, I slid my other leg alongside it, so that now I was lying on her, effectively in the missionary position, my cock up against her pussy.

Although my top half was still bare, we were both still dressed in the rest of our clothes, but even through them, I could feel the head of my cock against a soft fleshy part of her that had a natural valley in-between.

Now her face took on a more surprised expression tinged with a blush that crept up from her neck. She lay perfectly still, gazing at me.

“You can stop anytime by saying the word, if you want to,” I said, mimicking what she had said earlier to me.

Her surprise hardened to determination as she unconsciously bit her lower lip.

“No chance,” she said, “but you are hurting my wrists.”

I looked at where I was holding her and realised I was gripping her hard, a red mark forming around where my fingers gripped her.

“Ok, I’ll release them if you promise not to batter me with your fists.”

She thought about it for a moment.

“Agreed,” she said, a bit too quickly.

“No, no, I know you, you have to promise, and you know we have never gone back on promises,” I insisted.

“Yes ok, ok, I promise, cross my heart, pinky promise, blah, blah, and all that kid’s stuff,” she said, a bit ungraciously, rolling her eyes.

I slowly released the grip on her wrists, ready for any sudden movement, but she did as promised, and apart from rubbing each wrist in turn, didn’t try to fight me with them.

I thought we had reached a stalemate, but once again I underestimated my sister. With one quick movement, she sat up using just her stomach muscles, put both arms round my neck and pulled me bodily down against her, trapping my head in some sort of arm lock, my head to one side.

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