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Satisfaction Duty

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Ellie is the satisfier of the family, constantly have to satisfy her younger brother sexually. Their mom has always taught her to be someone he can fuck whenever he needed it. Her dad also takes a turn on occasion, just as her mom sometimes satisfies her brother herself,if she feels Ellie isn't doing a good enough job. Balancing her studies with her homely duties is hard, but she manages. All characters are over 18

Chapter 1: The Morning Ritual

The pressure against her cheek was warm and persistent, a familiar weight that pulled Ellie from a shallow sleep. Her eyes fluttered open behind her smudged glasses, finding the faded glow-in-the-dark stars on her ceiling. She didn’t need to look. The rhythm of his breathing, the particular scent of his cheap body wash—it was Derek.

“Mom says before class,” his voice mumbled, still thick with sleep. His hands were already under her worn t-shirt, palms skating over her ribs, thumbs brushing the undersides of her breasts. “I’m hard.”

Ellie suppressed a sigh, a skill as practiced as the one she was about to perform. She turned her head on the pillow. His boxers were tented, the cotton straining. The digital clock on her crammed desk blinked 6:47 AM. Her Comparative Politics reading wasn’t finished, and she had a calculus quiz at eight.

“Okay,” she said, her voice morning-rough.

She didn’t move to sit up. She just opened her mouth, her tongue lying flat. Derek shoved his smooth, hairless cock past her lips. She closed her eyes, the taste of salt and sleep filling her mouth. He let out a shaky breath above her.

He held the base and began to push forward, a shallow thrust that bumped the back of her throat. Ellie relaxed her jaw, a practiced ease, and let him set the pace. He fucked her mouth with slow, insistent strokes, his hips jerking. One of his hands gripped her shoulder; the other yanked her shirt up to her neck, exposing her breasts. He kneaded them roughly, his thumbs circling her nipples until they peaked into tight, sensitive points under his indifferent touch.

“Gonna come if I keep doing this,” he panted, his rhythm stuttering. He pulled out with a wet pop. “I want to go inside.”

Ellie nodded, pushing herself up. She turned onto her hands and knees, the mattress springs groaning. She hooked her thumbs into the waistband of her cotton panties and slid them down her thighs, kicking them toward the foot of the rumpled bed. Reaching over to her nightstand, she grabbed the small bottle of lubricant—cool plastic in her warm hand. She squeezed a generous amount onto her fingers and reached between her legs, smearing the slickness over her entrance. It was quicker than waiting for her own body to catch up.

“Hurry up,” Derek muttered, his hands gripping her hips, his knees pressing against the backs of hers.

She guided him, her hand wrapping around his shaft to position him. With a whimpering moan that was all boyish relief, he pushed forward. The initial stretch was a blunt, familiar pressure. She inhaled sharply through her nose, her fingers digging into the cheap comforter. He bottomed out, his pelvis slapping against her ass, and began to move in earnest.

It was a frantic, inelegant rhythm. He began to fuck her, humping her like a horny little dog, his hips pistoning in short, desperate thrusts. He moaned, a high, reedy sound that was clearly pure enjoyment, devoid of any concern for her own. His hands gripped the soft flesh of her ass, fingers digging in, and he slapped her once, twice—a stinging, possessive crack in the quiet room.

“Yeah,” he breathed, his pace quickening. “Yeah, Ellie.”

She knew the script. Her mind, which had been hovering near the derivative formulas for her quiz, dragged itself fully back into the damp heat of her bedroom. She pushed her ass back against him, forcing a low groan from his throat.

“Come on, Derek,” she said, her voice a deliberately husky parody of desire. “Give it to me. Fuck your big sister. Isn’t that what you need?”

“God, yes,” he whined, his movements becoming sloppier, more urgent. He pumped in and out at a quick, relentless pace, his little cock hard inside her like a warm, living branch. The friction, the sheer relentless use of her body, began to stir a reluctant heat in her own belly. Her pussy, well-trained and obedient, grew slicker around him, reacting to the mechanistic stimulation. It was a detached physiological response, a thread of unwanted sensation weaving through the numbness.

He was panting now, little animal grunts. “I’m—I’m coming, Ellie.”

“Do it,” she urged, tightening around him instinctively, performing the final act of service. “Come inside me. Fill me up.”

With a choked, wordless cry that was almost a sob, he obeyed. His body locked, shuddering against her back. She felt the hot, sudden pulse of his release flooding into her, a messy, copious gush that seemed to go on and on. He cried out, a raw sound of pleasure that echoed off the poster-clad walls, his whole frame trembling with the force of his orgasm.

Then he collapsed forward, his sweaty chest heaving against her spine, his weight pinning her to the mattress for a long moment. The smell of sex and sweat and him thickened the already stale air.

He pulled out with a soft, wet sound and rolled off her without a word. Ellie stayed on her knees, feeling the immediate, warm trickle of his sperm start to slide down her inner thigh. She heard the rustle of his boxers being pulled back up, the pad of his bare feet on the thin carpet.

“Mom’s making eggs,” he said, his voice already normal, distant, as if he’d just taken out the trash. The door clicked shut behind him.

Silence rushed in, louder than his moans had been. Ellie slowly lowered herself onto her side, staring at the blank face of her textbook. The wet spot on the sheets was cooling against her skin. She counted to sixty, then pushed herself up. The calculus was waiting. The day was waiting. She swung her legs over the side of the bed, her body moving on autopilot, and reached for the pack of wipes on the nightstand.

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