No Contest

The video progresses. After a few seconds of a black screen there is some shots of tits and ass as basic music plays. Before long black marks scroll across a yellow banner along the bottom of the screen. It says "1.2-1.2". Then, as the black marks pass over a square, sort of karaoke style, a distinct knocking sound accompanies it. The beat blends perfectly with the music playing. Elsie gives her cock a firm stroke on each beat. It takes you a moment but soon you stroke along with her in time to the beat. 1, 2, pause. 1, 2, pause. Swift double strokes separated by a beat as shots of swaying women's asses fill the screen.

"There ya go." She smiles. "You got it."

Just then the video shifts to a dude pressing his cock into one of said asses as the stroking beat shifts to "123-1.2.3.4.5.6". Again Elsie transitions perfectly as you falter a moment. This was more complex than you realized it would be. You assumed it would just be a steady stroke, maybe faster and slower in sections, but this was mixing up fast, slow, and pauses in creative ways.

El begins to bop her head and shoulders to the music as she jerked off with flawless timing. She was really getting into this. You follow her lead and just flow with the tunes. It didn't take long before the pair of you were playing along like old pros. Side by side you watch the screen and move to the music. In a weird way it was like the pair of you were dancing. It brought back old memories of you and your sister watching and dancing along to the music of early morning PBS kids shows back in the day.

It still felt weird, fapping with your hung sister, but mostly it felt good, both physically and emotionally.

It is about two and a half minutes in, as the video picks up into a rather intense "Double Stroke" section, that you realize you had made a terrible mistake. The whole idea of the video was to have El watch it as you focused elsewhere and pretended to watch it. But this particular type of video demanded your attention as you had to be ready to shift with the ever changing beat structure. The video itself, mostly of plump bouncing round asses getting stuffed, was very arousing. You manage to survive that section but you could feel that pressure rapidly building down below.

"No fair." You grunt. "You're not touching as much of yours. Not as much...nngh...stimulation."

Where as your hand could grip all the way around your shaft and covered over half of it as you stroked El's hand didn't even come close to encircling hers and seemed tiny as it zipped up and down her 10 thick inches.

El grins. "That's not my fault. I was born this way." She then leans over and bumps her shoulder to yours. "Fine. I'll even the odds." She brings her other hand and grips from other side and below the first. The pair of you continue, you one handed and she with a double grip.

"How long is this thing?" You grunt.

"I think it said 30-some minutes."

Half an hour!? Thank god you were racing El and not trying to survive the duration, you would never make it that long.

The beat continues mercilessly. You weren't sure what was harder, the long steady sections of the parts where you switched it up. The one hastened the end but the other meant you could never try to adapt to the rhythm. You are squirming and clenching hard when you at last hit a rest break.

"Ohhh fuck." You gasp.

"Problems?" Elsie winks.

"Nope, no problem." You try to settle yourself in this precious pause. "So that was round 1?"

El laughs. "No, it's just a break. Here we go again!"

"Huh?"

The next thing you knew you were stroking along to a hard steady beat...and then a double beat...and then even faster! You groan and squirm and hold back with all you had. You try to cheat your strokes but Elsie, being an old hand at this racing thing, saw it right away.

"Hey! No cheating."

You tighten your grip and are **** back into the super fast stroking. Christ, it seemed to go on forever!

"Something wrong Jesse?" Your little sister asks casually with a poorly disguised smirk. Her hands continue up and down her shaft and tip with firm even strokes. If she was close too she was hiding it well.

"Nope! I'm good!" You lie through gritted teeth. Fuck, fuck, fuck. You were riding the edge as it goes back to the double stroke pace and the woman on the screen rides a cock. You couldn't take much more of this.

Mercifully the non-stop beat eases into a more irregular one. Another few seconds of that double beat would have meant the end. The video continues without pause, uncaring of your struggles. Somehow, someway, you hold out through the long sustained single beat then double beat sections as scenes of sex and cumshots on big booties fill the screen. Your toes curl, your butt clenches, and your teeth were clamped so tight it felt like they might shatter...but you survive to hear the stop bell for the end of round one.

"Hohhh fuck!" You gasp and immediately let go of your twitching cock. A feather's touch would set you off right now.

"You did it!" Elsie says, genuinely happy and proud of you. It felt terribly condescending but there was no ill will in the words. "You made it through round 1! Good for you Jesse. You're doing so good." It was clear she hadn't expected you to make it this far.

"Yeah...no sweat." You bluff. You focus all your energy on tamping down the nut that still hovered so close to the surface.

There is a much needed 30 second break as a woman plays with her big tits. Far too quickly the bell for round 2 rings.

You and your sister start up again as scenes from two new adult performers with ample asses fills the screen. A basic beat starts and you are stroking along with it.

The break between rounds hadn't been nearly long enough for you press back the rising pressure. As you stroke you very quickly feel yourself right at the cusp once more.

"Mmmmm!" You groan as you fly past the point of no return.

"Come on Jesse, you can do it." Elsie urges you.

"Nnnngh!" You were seeing stars.

"Come on brother, not yet. I'm not even close. Remember the bet. Don't cum yet."

"Hahhhhh!" The dam bursts.

Barely into the second round, just as the tempo switches to a "123-1-1" beat and shows a woman riding a cock, your orgasm comes whether you wanted it or not. Having held it back as long as you did it was a doozy. You scramble to pull your shirt up just in the nick of time.

"GUHHHHH!" Your cock jerks and a big wad of warm creamy ejaculate blasts up onto your tight stomach. You buck and thrust into the air as another long sticky rope shoots in a long arch, splatting down onto your skin.

"Whoo! There it is! He he he he! You're so cute when you cum. He he he he!" Elsie giggles uncontrollably, her hands still keep time to the video but her eyes were on your jizz spitting dick. "I win!"

"Nnngh! Nnngh! Nnngh!" Guttural grunts is your only response as you blast your nut butter all over yourself. Bliss washes over you accompanied by a deep embarrassment. Unlike the first race you'd been ready for this one. This time you had done your best, your honest to goodness best, and you still blew your wad inside of nine minutes. From the corner of you eye you see your calm smiling sister still stroking her long thick cock to the beat of the video with strong confident motions.

You didn't just lose, you didn't even really compete. As it was with size versus your sisters so it was with stamina, a no contest.