Listen to your sister

"Fuck Eric! Fuck your tight little whore! You're so fucking big baby!"

Your sisters cries echoes all throughout the house. You know she have snuck Eric in to fuck her before, but you have never heard her be this loud. You lay on your bed, cock straining against the rigid plastic of your cage. You have never wanted to touch it more in your life before, but being unable to do so, the horniness is overwhelming. You start humping into the air, humping into a pillow, anything just to try to get off.

"Fuck my pussy Eric, fill me baby! Use me like the slut I am!"

Your sister is really hamming it up, but to your dismay, its working. You lay in your bed for what feels like an eternity, helpless, having to hear your sister get fucked by her boyfriend while your cock strains against the cage. Emily's moans etch into your brain, and all your sensations feel like they are going into overdrive. Finally after what have must felt like an hour, you hear her cry out.

"Yes baby! Cum in me! Fill your little slut up!"

Your body feels overwhelmed, and you have to put the pillow over your face to muffle the moans you unconsciously make. You have been locked up for what can only have been an hour or so, but you are already feeling tortured beyond belief. And you don't even know if Emily is going to let you have a release in a long time, if ever. All these feelings are too much for you, as you drift off into sleep.

You are awoken by a soft hand nudging your shoulder. "Wake up John." It's your sister, wearing one of your oversized band T-shirts, covering her almost down to her knees. You can see pure bliss on her still flushed face as she beams. "I borrowed this from you. I felt like it's fair, seeing that you decided to borrow some of my clothes today."

You don't reply. "Scoot over, I wanna talk." your sister continues, as you move over on the bed, making room for her to lie down next to you. "So was that as fun for you as it was for me?"
"Em, you shouldn't be here, what if Eric..." I start, before she interrupts me. "Oh, don't worry. I kicked him out for today. I got what I wanted out of him. So tell me, did you like it?"
"Em... it was..." "Awesome right!" she interjects. "I don't think I've cum that hard ever before!" She glances over at your cock, tightly confined in your cage. You freeze as she moves one hand over to your crotch, and grazes the outside of the cage. The sensation of her fingers pushing on your cage are amplified as the plastic pushes down on your cock. You let out a little moan as Emily giggles. "Oh poor little John. You haven't even been in this cage for an hour, and you already react like this."

Not even an hour. You thought for sure that they had been going for most of the afternoon as you had lied there listening, but it hadn't even been an hour. You suddenly feel her hand gently grazing your hair, the sensation is too overwhelming and you let out yet another moan.

"You are so cute when you moan like this John, you know that?" Your sister looks at you with genuine love in her eyes. When you look at her, you see that the shirt she is wearing has slipped up a bit as she moved her hand, and her panties are now visible beneath the shirt. Her wet, stained panties. You can't stop staring.

"You like what you see John?" your sister says teasingly. "Eric made quite a mess down there. These are the third pair of panties that will need cleaning today." You see her move her hand down her panties, before pulling up two cum soaked fingers from them, as she moves them over to you.

"You promised to help me clean up today didn't you?"