Sibling Ninja Sex (closed)

saedo

Delver of the Deep
Joined
Aug 6, 2010
Posts
3,547
Closed for SindyNC17


"Sindy, is everything okay in there?" Our mother's voice sounded from the other side of the closet door. Only a few inches of wood separated us from discovery. I hoped fervently that the pounding of my heart only sounded like bass drums in my head.

I suppose in retrospect that we should have called off the wager right then and there. It was a stupid bet to begin with and if our mom found out, there'd likely be no end to the repercussions. So the smart move would have been to step back and let Sindy respond to our mother calmly.

But I could see in Sindy's gaze as we stood almost cheek-to-cheek that if I quit now, she'd say I'd lost. I wasn't about to let her win on a technicality. So I wiggled my finger inside her and whispered, "Tell Mom you'll be down in a minute."

~~~~~~
To understand how I wound up knuckle-deep inside my sister, it helps to understand that we're twins. Sindy is older by about six minutes, but basically we've grown up together, almost like a single unit at times. Mom even gave us similar names: Sindy and Simon.

We've always been preternaturally close. Even now, our bedrooms are connected by a shared bathroom. After a lifetime of that, we've seen a lot of each other. Sindy and I don't have as many barriers between us.

Being twins also makes us a bit competitive, too. There was always the impulse to prove who was stronger, faster, smarter, etc. As we got older and we developed different interests, that diminished somewhat. But it never went away.

Anywise, those dual factors had resulted in another one of our verbal one-upmanship tiffs. I can't even remember how it got started, but soon enough we were each exchanging verbal barbs about our respective sex lives.

Sindy always had the advantage here because she was unequivocally smoking hot. She'd always been pretty, but when puberty hit, my sister got a quadruple dose. By the time we were freshmen, she had the biggest tits frame in school and the gap has only increased since. With her tiny waist and slender frame combined with a cup size deep in the alphabet, she's been custom-ordering lingerie for years. Naturally this makes her popular with boys and girls alike, a fact she enjoys lording over me.

I, on the other hand, despite being athletic and toned, have had comparatively less success with the girls at school -- a fact that she also enjoys pointing out. I countered quality was more important than quantity, and round and round we went.

Things got heated when she hit below the belt. Sharing a bathroom as we do, Sindy is well aware that I am heftily endowed. Although she's never seen it in action, she has repeatedly speculated that at full arousal it must be so terrifyingly huge that I could never hope to pleasure a woman with it.

Since her speculation hit uncomfortably close to truth, I rather vehemently declared that I was quite skilled at pleasuring the fairer sex. I insisted that I routinely could get a date off using just finger and thumb.

Sindy doubted me. I doubled down. She suggested I prove it, perhaps as a joke. I was too fired up to care, so said I would. Both of us were too stubborn to back down. Thus did I wind up with my index finger buried deep inside Sindy's pussy.

Unfortunately, about a minute into our contest, our mom knocked on Sindy's door. We hid in Sindy's closet, but mom could tell Sindy was inside. Which brings us back to the start of our sordid tale: hiding and hoping Sindy could make our mother walk away without opening the closet door.
 
http://http://epicsaholic.com/pics/963/redhead-with-cum-on-tits.jpg

Sindy braced both hands against the walls of the closet, her back arched as she bit her lip to keep from letting a satisfied moan escape. Her brother, pressed to her backside, had one hand gently kneading her left tit through her sheer white tank top, the other hand between her naked thighs, fingers caressing her slit as he whispered dirty nothings in her ear.

She was amazed that his fingers were turning her on as much as they were. She'd been fingered millions of times maybe, but the combination of his dirty talk and the growing bulge in his shorts that was pressed against her ass was driving her mad. But there was something else too...They were of course doing this in her closet because her parents were home, and she thought that might be adding to the heat she felt...

Just as Sindy felt her legs begin to shudder with her first orgasm, her chest heaving as she fought for breath, she heard her mother yell through her bedroom door.

"Sindy? Is everything OK in there?"

That brought her out of her rhythm, her hips stopping their grind against her brothers thrusting and twisting fingers. Fuck.

She was about to panic, but her brother hadn't removed his fingers from her spasming pussy. Instead, he simply thrust deeper, pulling her tight back against him and whispering "Tell her you'll be down in a minute"

her whole body shuddered as he said it, and she had to let out a soft moan before she could properly speak.

"I'm fine mom! Just...oh..Just changing! I'll...I'll be Mmmm down...in...a...minute!"

Just as the word minute escaped her lips, her brother thrust deeper inside her dripping cunt and she had to fight to keep from squealing as she came. She let go of the wall and reached both her arms up and around his neck for support and just let his fingers assault her pussy, riding her orgasm as she soaked his fingers.
 

"I'm fine mom! Just...oh..Just changing! I'll...I'll be Mmmm down...in...a...minute!"

I held my breath, waiting to see if our mother would believe it. For a few seconds, there was nothing. Then she called back to us, her footsteps headed away. "Okay, sweetie. I'll be down in the kitchen."

Grinning, I intensified my efforts with finger and thumb. Sindy bit her lip, trying to hold on, but I knew I had her. A short while later, she collapsed against me, her entire body quivering in climax.

I let her slide to the floor. Sindy moaned as she pooled in a heap. Her shorts darkened with the same juices that coated my hand. "I win," I declared, then headed to the bathroom to clean up.
 
Sindy laid there a moment, quivering, as he left. She couldn't believe shed just let her brother make her cum! But it had been...amazing. He seemed to know how to touch her just right...when to speed up, when to slow down...it was uncanny. And she'd loved it.

She went to her own bathroom to change and clean up, before heading down to see what her mother wanted, head still spinning a bit from her orgasm.
 

Sindy followed me into our shared bathroom. Two sinks dominated one side with the toilet and tub opposite. While I washed my hands in my sink, Sindy dropped her shorts and panties and stood half-naked before hers.

Her tight little pussy lips had clamped shut, but the flesh was pink and puffy from her orgasm. Shimmering trails of moisture trickled down her thighs. Though she probably could have done with a shower, our mother would likely find that odd. Sindy instead settled for a damp washcloth to give herself a quick cleaning before changing into clean shorts and rushing downstairs.

~~~~~~
In retrospect, I recognized that I shouldn't have gotten into such a clash of egos with Sindy. What'd we'd done in the closet was certainly a bit beyond our usual sibling rivalry. Still, aside from some more odd looks from Sindy, I thought the matter forgotten after a few days had passed.

I certainly wasn't thinking of her that night on the phone with Rachel, my girlfriend. She breaking the unpleasant news that she unexpectedly going out of town this weekend with her parents, so we weren't going to get together tonight as we'd planned. Being the dutiful boyfriend, I was naturally telling her how my heart would ache for her return.

Of course, the real ache could be found between my legs. My balls were feeling heavy already and I'd been very much looking forward to having Rachel empty them. I could make do on my own with a some "self-help", but I found stroking my own cock to be a pale substitute for having a girl do it for me.

Unfortunately, I didn't have any ready alternatives. Sindy's taunts about me being too big for any girl were fairly close to being true. Before I'd gone out with Rachel, I'd had four different girls stop dating me soon after discovering the bulge running down my pants leg. Even Rachel was too intimidated by it to yet attempt mounting me; she still worried that it'd split her in half or penetrate all the way into her womb. Still, she was at least comfortable enough to let me titty fuck her; she enjoyed being splattered with cum.

Rachel tried to make it up to me by engaging in a little phone sex. Though it was a lackluster alternative, I agreed. We both set our phones on speaker so we could keep our hands free. I stripped down to my boxers and lay prone on the bed as I listened to her describe our opening foreplay.

By the time Rachel had described disrobing and was now telling me how sensitive her nipples were, my cock was starting to plump up. Then my mattress shifted. I opened my eyes to find Sindy sitting next to me on my bed with a big smile on her face. My first instinct was to tell her to get the fuck out, but that would mean Rachel would realize Sindy had been listening in. Rachel would be humiliated if that happened.

Instead, I put my index finger to my lips and silently shushed Sindy. I then wordlessly jabbed at the door, instructing her to leave.
 
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