Making the rounds.

Your first stop is to check in on Kenny and Violet. You find them in the twins' bedroom and you step inside just as your sister is pulling out her sketch pad and Kenny is standing in the middle of the room, waiting patiently. They both look up at your entrance.

"You will ignore my presence and act just as you normally would until I leave, at which point you will forget I was here," you tell them quickly. The suggestion immediately becomes fact, as Violet pulls out her charcoal pencils and gum erasers without any further glances. She finds a seat on her bed, facing Kenny.

"How would you like me?" your brother asks. Your sister blushes at the unintended double entendre.

"Well, naked for starters," she says with a little giggle. She sets the pad on her lap and flips through it, looking for a blank page to start from, but you can see her watching Kenny from the edge of her eyes as he takes off his clothing and sets them to the side. Her nostrils flare as he turns around, sending his hanging cock swinging like a big pendulum, slapping his thighs as he moves. He's not quite as large as you, but he's nothing to sneeze at either and Violet definitely seems to appreciate his...generosity.

"Okay. Now just stand there, arms to the side for this first one," she instructs and Kenny follows her directions. Not much happens for the first ten minutes or so, as your sister lays pencil to paper and outlines the shape and form of your brother's body on her paper. She even seems to be able to ignore his nudity while she works, laying down the lines for his cock just as easily as she had for his arms of legs. It's your mere presence in the room, that makes things more interesting.

Without wanting to, and with a modicum of distress, Kenny's cock begins to rise, moving from semi-hardness to full erection in less than a minute. You're ability to drive up a person's libido has taken hold of him and no matter how hard he tries, he can't make it go back down. He moves his hands to cover it, forcing Violet to look up and observe his massive protuberance, and she snaps out of her trance. Her eyes drink in Kenny's member, inadequately hidden behind his fingers, and her breath questions.

"Uhm...." she mumbles softly. "No, that's okay. I can draw it like that."

Kenny moves his hands away, looking up at the ceiling or to a far corner of the room, anywhere but at his half naked sister who is currently erasing his crotch area on her sheet and getting ready to draw it anew. She carefully outlines its curved shape and adds vaguely round orbs for the balls hanging underneath, waiting to add further details until later. This time, she does take extra time to create an exact replica of his cock on her page, staring at it for long moments before bowing her head to her drawing once more. And if she add's a little extra length and girth to her version...well, you'll chalk that up to artistic expression.

She begins to add more details, lines and shadings that make it look more and more like your brother and not some random male figure, but you can tell your presence is affecting her too. A light sheen of sweat has broken out across her brow and she's becoming more distracted. Her pencil keeps returning to Kenny's crotch, staying there longer than anywhere else. After a couple of minutes, she breaths in deeply, making her chest rise and fall with an eye-popping bounce.

"I...uhm....I'm going to need a closer look." Violet slides to the floor and kneels before your brother and his thick, erect cock, inching forward until she's almost touching it with her nose. She carefully inspects the bulging vein on it's underside, gawks at the mushroom tip and its deep red skin, and compares his nut sacs, looking for any differences.

Kenny can't look away any longer and he tilts his head down, watching as his sexy younger sister inspects his shaft like she wants it burned in her memory forever. The sight of her on her knees is intoxicating and your brother moans loudly.

His cock twitches.

Normally, this wouldn't have been such a big deal, but the slight movement causes an unexpected accident. His cock smacks into Violet's nose. Both of them pause, his prick rigid as a stone along the side of her nose, her eyes widening in shock. You half expect for your sister to pull away, apologize embarrassedly and maybe cancel the session entirely. Instead, she tilts her head to the side and kisses his shaft.

Kenny groans as the feel of her lips against his shaft and his hands ball up into fists. He pushes his hips forward, pressing his erection harder against her face, unable to resist his sister's allure any longer. Her tongue darts out, running along the underside of his shaft with a gentle but deliberate lick and, finding that the taste is alright, does it again. She adds a hand to work, grabbing as big a handful as she can manage before sending it up and down his meat stick. Her mouth keeps working hard, eventually find its way down to his balls, which she sucks inside like a professional slut.

Emboldened, Kenny reaches down and fills his right hand with one of Violet's boobs, mashing it between his fingers as she continues jacking him off. When she offers no complaint, he tweaks and twists her hard nipple, eliciting moans of pleasure that ricochet against his scrotum and urge him to do it harder.

Violet gets an early warning as Kenny's balls swell and she sits back, pulling down his cock until she can point it at her face. She opens her mouth, giving him a target to shoot for and your brother's accuracy is to be commended. His first spurt goes wide, landing on her dimpled cheek, but after a small adjustment the majority of his following shots land in her waiting mouth. She closes her lips and, with great pride on her face, swallows his load.

Post orgasm, some of the tension is broken, and your siblings remain in their current positions, looking at each other, breathing heavily and grinning like fools. Smiling yourself, you decide to move on and let them sort themselves out. Perhaps they can go back to finishing Violet's homework...or perhaps not. Your cock, aroused from watching your siblings finally initiating sexual contact, making the first moves to total corruption, precedes you as you walk out of the room and into the hallway.