Kim makes you watch as she punishes Becky

By: Cheese111

“Clearly my hope that you would be able to manage your 'girlfriend' was misplaced." Kim sneered, walking over to her desk. You didn't like her tone, even less the way she referred to Becky almost sarcastically as your girlfriend. A heavy feeling sat in the base of your stomach. It didn't get any better when your sister returned with a roll of clear tape. She dropped Becky down on the cabinet. You watched your girlfriend wheeze and sputter, gasping for her first unrestrained lungful of air in what felt like an eternity. But before she could do any more than catch her breath two large hands came down with a piece of tape, sticking it to Becky's arm and pressing it firmly against the cabinet.

"What the fuck do you think you're doing you psycho?!" Becky shouted up, still unwilling to bow down before the titanic figure that was your sister.

"Shut up or the next piece is going on your mouth." Kim snapped back. Against all your expectations that seemed to do the trick. The next few bits of tape secured all of Becky's limbs, leaving her stuck to the cabinet.

"Since little Willy there isn't getting the job done, Big Willy will have to step in. Understand that you've brought this on yourself. And you..." She pointed an accusatory finger down at you. "You best look closely. This is what happens if you don't control your reckless 'girlfriend'. And Big Willy isn't about to let some nasty ex become a bad influence on you."

With every word she spoke another wave of discomfort washed down your spine. You could hear the undertones in your sister's voice. And the evidence was right there in front of you. She was getting off on this, her cock stiffening with every passing second. Becky was trying to wriggle free, but the sight of that huge shaft looming over her brought her struggles to a halt. She raised her head and looked at you with pleading eyes.

THUMP

In an instant Becky had all but vanished beneath the swollen head of Kim's cock. Your sister pushed down on the base of her shaft to hammer her pillar of flesh into your girlfriend. The only visible part remaining was Becky's hand. It twitched wildly at the no doubt overwhelming sense of pressure. The stink of Kim's musk began to radiate from the excited mast as Kim let it spring back up. Becky was only given a moment's reprieve before the huge mass came down again.

"Please, you're hurting her!" You plead, but Kim shot you a merciless glare.

"Do you want to be down there with her?" She hissed. You bit your tongue. Where she to offer you to take Becky's place you might've considered it. But it was clear that she would not be permitted to skip her punishment and adding yourself to the pile didn't feel particularly helpful. You just looked on with fear as your sister slammed her erection down once more.

This time it wasn't lifted up. Instead Kim pulled back a little, leaving only Becky's legs and waist covered under impossible amount of cockflesh. With a disgusting squelch a hefty dollop of pre leaked out, smothering your girlfriend. Without help you feared she might drown, but another brutal slam dispersed it, sending splatters of it in every direction. You were hit in the chest by the foul spray, shielding your eyes to avoid any getting in there before quickly lowering your arm out of fear for Kim's wrath. Every subsequent hit from Big Willy carried this sickly wetness with it, your sister pausing every few hits to deposit more pre onto Becky.

You knew this was heading for a climax as slowly the clear pre was infused with more and more streaks of cum. Becky's torment was just a creative form of masturbation for Kim at this point. Any ideas of order or discipline cast aside for the simple feelings of pleasure and desire. The heavy mass slammed down faster and faster, your sister moaning with excitement with each wet slap. Finally she slammed Big Willy down well short of hitting Becky at all. With a howling moan Kim hit a powerful orgasm, her cock erupting with thick ropes of cum. Your girlfriend was directly in the line of fire, the warm slime drenching her and quickly building up on top of her. Were it not for Kim's intervention she might drown underneath it all. Your sister wiped away the gooey release from Becky's face, standing back proudly as Big Willy dribbled a few last drops onto the floor. That will have taught Becky the harsh lesson she needed.

You look over to the puddle of cum containing your girlfriend. It was eerily still. Carefully you move over to her, trying not to slip in your sister's release. How is Becky doing?