Rachel Gets Stuffed

You head down the hallway and reach the first bedroom, your younger sister Rachel. You can hear some shitty pop music coming through the door. Tommy steps up beside you and shakes his head.
"If you're fucking with me, I'm gonna kill you dude."
You grab the doorknob.
"Oh, you'll see. You ready for this?"
Tommy seems eager and ready. He nods to you.
"Fuck yes. I've wanted to do this since the first time I saw Rachel in a mini skirt."
You slowly open the door to your little sister's room.

Rachel is standing in front of her mirror, messing with some makeup. You catch her in the middle of getting dressed. As such, she's only got on a pair of panties and a t-shirt. As the door swings completely open, she turns to scowl at you and Tommy.
"What the fuck, pervs! Get out of my room!"
Tommy panics.
"Dude, I thought you said ..."
You cut him off.
"Relax, part of this world is some of them struggle a bit in the beginning. It's not all of them, but most. I think it adds a bit of kink. But in the end, they always give in."
You turn back to Rachel, who has backed into the corner of her room.
"Don't they, sis."
You can tell Rachel is terrified. It was bad enough when there was just you running around fucking everyone and everything in sight. Now there's two hard cocks at the entrance to her room, and you're both bigger than before.

"Come here, Rachel."
You and Tommy step into her room and shut the door behind you. Rachel continues to cower in the corner. You move towards her while Tommy flanks from the other side.
"So, Tommy, what would you like to do first?"
Tommy licks his lips and eyes your half-dressed sister.
"I've never seen her tits."
You grin and move in closer, trapping Rachel between you, Tommy, and the walls.
"A good choice to start. Rachel, take off your shirt for Tommy."
She shakes her head and sinks down further into the corner, trying to escape her fate. You finally close the gap completely and grab her arm, pulling her back into standing position.
"Take. Off. Your. Shirt."
With the firmness in your voice, Rachel finally submits. She reaches down and pulls her shirt over her head. Her young, firm tits bounce into Tommy's view and he immediately shoots his hands out and begins mauling them.
"Oh. My. Fuck. You weren't kidding man, this is the best. What else can we make her do?"
You throw Rachel's shirt to the other side of the room. Then you run your fingers down the side of her face.
"Anything, Tommy. Anything."

Tommy's enthusiasm shows as he kneads and pinches Rachel's breasts. He pulls on the nipples, making her squirm and squeal. After a few seconds, he realizes you are still standing there and steps back.
"Oh shit, my bad, man. She's your sister."
You laugh at Tommy's nervous reaction and reassure him.
"Don't worry about it, dude. The whole point of bringing you here was to have someone to share with. Mi pussy, es su pussy. Or something like that."
You both laugh and each take one of Rachel's tits in hand. You get a few good squeezes in before you push on her shoulders, leading her down to her knees. She kneels between you and Tommy, with your hard cocks both pointed at her face.
"If you liked that, you are gonna love this, dude. She's got a hot mouth and tightest throat, I swear."

You grab a handful of Rachel's hair and yank her head to face you. You swing your dick back and forth a few times, slapping her in the face with it. Tommy uses one hand to stroke his cock and the other to continue pinching and twisting Rachel's tits. After rubbing your dick on her face, you line up your cock with her mouth and slip inside. With your new size, Rachel can only take about a third of your cock without gagging. You let her suck on the head a moment before slowly fucking her mouth.
"Watch this!"
You push hard on the back of Rachel's head and thrust forward with your hips. Your cockhead hits the back of her mouth, meets some slight resistance and then pops right into her throat. Rachel's eyes tear up and her throat convulses. She only gets about 6 inches of your cock in her mouth and down her throat on the first try.
"Oh shit dude! I've only seen something like that in a fucking porno!"
You pull your cock all the way out of Rachel's mouth and then turn her head towards Tommy.
"Have a turn, bro."
Tommy needs no other encouragement. He quickly grabs your sister's head and lines his dick up with her mouth. Without hesitation he crams as much of his dick into her mouth as hard and as fast as he can. Rachel gags as almost 7 inches of Tommy's cock disappear right down her throat. Tommy holds firmly on her head while bucking his hips forward. He tries desperately to slam the last inch of dick into your poor sister's throat. Realizing this is as far as he can go, he fucks her throat a few strokes and pulls out, passing her head back to you.

"That was fucking intense. I've never had a girl take me that deep before. Even when I didn't have this giant cock!"
You reassert your grip on Rachel's head and put your dick back into her sweet mouth. Saliva and phlegm drip out of her mouth and down her chin. You content yourself with just fucking her face for a minute. Then you stop, letting her suck in a deep breath, and slowly push yourself into her throat. 6 inches. Then 7 inches. Then 8 inches of your cock disappear into her mouth. Her eyes bug out of her head as she struggles with your enormous cock. You can't push any further at this angle however. You hold her there as she spasms around your cock lodged deep in her throat. You release her, her head flying back off your cock as a long, thick trail of spit hands from the head of your cock back into her mouth.

As soon as your cock is free, Tommy is lining up his to take your place. He slaps his cock across Rachel's lips a few times while she gasps for breath and then jabs his way into her mouth. He fucks her face as you step back and look around her room.
"Hey, let's throw her on the bed."
Tommy slowly pulls his cock out of her mouth.
"Ok."
You each grab an arm and heave Rachel onto her bed. Rachel curls up into a ball as you both stalk around her.
"Well, Tommy, what do you want to do with her now?"