Christa Hill is a tired, horny girl. She stumbles in the door, long hair tangling on her purse snaps, on her fingers, everywhere as she puts away keys with a jingle that shouldn't be so loud because her parents might be home. She swings up the steps, snickering as her cheap-stylish shoes trip one another, a drugged-up college drop-out sneaking beauty and youth through her family's dim kitchen. She's sweaty from dancing, from necking and groping with her boyfriend and almost taking it up the ass for the first time on a couch with six other people around; she's giddy and high and she needs a shower. But the hallway carpet twists her feet in the wrong directions and she can't think of where the light switch might be so she aims for her room as best she can.
Through a door frame and around a corner, Christa pilots her compact, uncharacteristically clumsy body, sliding along walls and past a hardwood dresser, whose splintered edge catches and nearly steals away her clingy pink top, which will not be worn again after this night of invading boyfriend's arms and unforgiving furniture. She knows the bed is close, so she unfastens her soft jeans, letting them crumple down her legs. She'll sleep in the top. Maybe she'll rub herself a little, if she can keep conscious, because she still really needs the dick that softened earlier when her drunken lover passed out but fingers are nice too. Moonlight from the nearby window highlights her rounded rump while she struggles to lift and keep both knees on the bed, and as she sinks her face into that light, the only part of her mind that's clear enough to notice is the part that marvels at how pretty it is. And so, instead of wondering why she has never seen the moon from her bed before, Christa crawls with the resolution of weariness out of her pants and onto her brother Paul, who is sleeping quietly in this, his bedroom. She nestles against his lower body through the sheets, and idly works a hand between her thighs.
Of course someone is going to figure out what has happened. And this turns out to be Paul, whose leg is now pinned in a position that is awkward enough to force a reaction, whereas previously he had tracked his disheveled sister's intrusion with only half a dreaming ear. Though he is a few months past his eighteenth birthday, this is the first time Paul has participated in a piece of erotic fiction, and he struggles some moments to understand what in the world has landed on him. He shifts, improving his position and thus almost losing interest, so nearly asleep is he still, but humanity has not come so far as to produce him without teaching his penis what to do when a warm face breathes hot breath on it through only two or three scant layers of fabric. In ten or twenty seconds (though no one is keeping track) the lazy boy grows a firm, proper hard-on, and his hips even rock a little in search of pressure. Christa is just about asleep herself, but she reacts to the motion, pulling her arm up and under the rumpled sheets to encircle the warm anonymity on whom she lies. Further down, her fingers gently stroke a damp, engorged vulva.
Paul pushes his hungry groin weakly against its passenger, and though he doesn't yet understand that this is his pretty sister whose cheek now cradles his rigid cock, the sensation of it quickens his heart and inevitably pins the fabric of his dream to that small portion of the mundane world wherein fingers knead boxer-clad buttocks and face presses against manhood. In his mind he is trying to make it with the misty figure of bosomy blonde Elaine, his first high-school crush, and she's very close but he can't seem to move his hands to get his pants off, and the urge worries at him until he's slid out of the dream far enough to begin tugging aside his sheets.
Still animated by the pilot light burning under her slickened fingers, Christa smears herself languidly over her brother, letting the sheets hitch from beneath her. Her arm tightens around his thighs; her open mouth is less than an inch from the slit in his boxers. Paul lurches onto his elbows, not quite understanding why he can't free his legs. Then his eyes open, and he takes in the streams of red-blonde hair that pool over the moonlit portion of his bed. For a long, quiet moment he is frozen. But nothing changes; no one steps out to enforce the usual rules. So his shock, unnourished, bleeds away, and by the time it's gone the seed has already rooted: He is being groped by his sister, and she's messed up or something, and it sort of makes sense that he could touch her if he wanted. At once he is reaching out gingerly, his hand shaking a little, and when he touches that soft hair she mews, and he notices that she's moving. On top of her hand. And her legs are bare, and he gets to touch her butt, because there it is. The night is too late, and the hormones too thick, for consequences to have meaning. Though of course he thinks, with what small thinking part of him is awake, that he's going to wake the dumb girl up in a minute and send her off to her own bed.
So sitting up, he gently strokes Christa's temple with his finger, down her jaw, down her neck. She masturbates slowly beneath him, and her heat seems to collect right in his penis, making it harder. He'll take it out if this goes much further, plans be damned, but now the thought isn't in him. Instead he gently palms the sleek meat of her side, making that his. He draws little circles on her ribs. And when he has grown used to that, the magnetic bulge of her chest, just peeking out beneath her busy, taut arm, draws him one step deeper. He traces the boundary between tit and arm, and it's all so sexy that his muscles forget about the incest taboo and his groin hitches up so that he can feel delicious pressure against Christa's face.
"Mmmmm," she hums, and though she seems fairly senseless Paul knows (in his loins where it counts) that she's hot for him and he has permission. So he slowly grinds on her face, torso hunched awkwardly over her back, while his hands settle over the warm firmness of her ribcage, not quite ready to grasp and squeeze. Part of him thinks something is wrong about this; he knows he'll stop in just a moment, and before half a moment is past his decision is washed away in the urgent beat of his roaring pulse. He pushes on Christa, and his heavy, horny sister pushes back, boring her temple into the folded boy; they have entered a contract and now at least one must be brought to orgasm. By chance, one of Christa's moist lips pecks at bare dick-flesh through the splaying hole in Paul's boxers, and he tenses and pants, feeling a portion of his innocence deliciously burning in the heat of her breath. He clutches her now, maneuvering without maneuvering, too sticky with the inertia of human socialization to do the sensible thing and grasp his penis so that it may be inserted into her mouth. But the equally lusty Christa, whose nostrils are filled with urgent crotch-musk, presses her mouth into its support, finding by touch the naked flesh of her brother. She works her lips over the hole, stroking herself hard as the cocksucking habit looms strong in her brain.
This is all it takesโnow Paul is the one owned. Her wet mouth nips his shaft, lapping exquisite warmth over his delicate nerves, and there is no more room for decision. Christa is moving slowly; both her arms are occupied and so she cannot easily trap the knob of this hot dick and suck as she wishes to do. But every little advancement newly paralyzes the boy, whose hands no longer think to grope, though their fingertips now rest on the same bare, graceful hips that he's never quite let himself fully lust after through all the long years since puberty. Then she catches his shaft in a good, wet grip, so that the sensitive length of him tilts out through the boxers finally, dragging on fabric as it goes. And before he's finished groaning at that, she's popped her lips over the glans and taken him properly.
That tongue feels so nice. He clutches her sides, doubled over atop her, and she has to release her own throbbing glands to stay in balance. Christa is really hot now, and she suckles with force. She barely knows where she is, but she knows she wants to be used. The cock in her mouth twists at the kink in her mind; when its blood-firmed glans pulses out desire she rushes to lick around its rim, and when the shaft thrusts she makes her tongue a channel for it, just too narrow to be passed without friction. When it traverses that passage and continues to push, she opens her throat. Fingers press around her belly, and she shimmies in their grip, making them feel her, letting her top ride up. She dreams of her boyfriend. She might pass out like he did, if she keeps this up much longer.
But Paul, gradually enveloped to the bone in his sister's salival massage, will surely shoot down her throat first. As she unsteadily rises upon quivering thighs to accept him ever deeper, he sags onto her back, nuzzling her sweaty panty-line. His hands fall naturally to her ripe-apple breasts, which he kneads inexpertly. Christa can no longer move significantly, impaled as she is, but some fantasy of hers is coming alive and her strangled grunts and moans are stimulation enough for Paul, who squeezes hard on his shapely handholds as his testicles contract and his pleasure threshold sags, then collapses. Cheek to cheek, he gasps and twitches and injects a blob of incestuous cum past Christa's slack, spasming throat. She hums her excitement, struggling unnecessarily to swallow, to take it even deeper. Together the rigid siblings press, holding steady their quivering frame so that semen can be launched into stomach, spurt after spurt after spurt.