Crossing the Line: Insatiable Best Friends

The rain had been coming down since dusk, sealing Brigitte's apartment in warm lamplight and the soft tick of water against the glass. Sullivan sat on her couch with his legs spread, watching her cross the living room. Brigitte was twenty-two, same as him, barefoot on the rug in a thin gray tank top and cutoff shorts, and he still had not learned how to look at his best friend without wanting her. They had hooked up before—four times, if he counted, and he did. Each time had been good in a careful, almost polite way. Soft mouths. Gentle hands. The kind of sex that let them pretend afterward that nothing between them had shifted.

Tonight the pretending felt like a lie he was done telling.

Brigitte dropped onto the cushion beside him, close enough that her bare thigh pressed warm against his. "You've been staring at my tits since you walked in," she said. Not mad. Watching him. "What's actually going on with you?"

He met her eyes and stopped editing himself. "I've been fantasizing about taking you rougher. Dirtier than we've ever done it. I held back every single time, and it's been driving me crazy."

She turned toward him fully, one knee drawn up, the tank top dragging tight over the heavy swell of her breasts. "Then quit holding back." Her voice dropped. "My appetite's been getting worse for months. I get home from work already soaked through my panties. I fuck myself on my fingers until my hand cramps and I'm still not finished. I'm a nympho, Sullivan. I know exactly what I am. And I want you to use me the way you really crave. No more vanilla. No more careful best-friend sex. Let go. I'm asking."

Heat punched through his gut. He searched her face—clear, eager, completely sure—and felt the last lock on his restraint give way. "You want me like that."

"I want you worse than that." She leaned in until her breath warmed his mouth. "Stop being good to me. I can take every filthy thing you've been swallowing."

The kiss that followed wasn't careful. Sullivan caught her jaw and took her mouth hard, tongue pushing deep, and Brigitte moaned into it like she had been waiting all week. When he pulled back, his voice had gone low and rough.

"These," he said, cupping her heavy tits through the thin cotton, thumbs dragging over her nipples until they stood hard against his palms. "I've been obsessed with them. With getting my mouth all over this skin and sucking marks into it until you can't wear anything low without showing what I did." He squeezed, possessive, and she arched into his hands. "Your ass too. I'm going to cover it in hickeys. Your neck. I want you walking around with my mouth on you like a claim."

Brigitte's eyes lit, bright and starving. "God, yes. Don't you dare go gentle on me now."

She slid off the couch and dropped to her knees between his thighs, yanking his belt open. The zipper rasped. She shoved his pants and boxers down, and his cock sprang free—thick, heavy, longer than average, the flushed head already wet. Her breath caught, greedy.

"Fuck, I forgot how big you are," she said, wrapping both hands around the shaft and stroking once, feeling him throb. She looked up, wicked and sure. "Stop holding back. Fuck my throat. Use me like the insatiable slut I am."

She opened wide and took him in, lips stretching around the thick head, and didn't stop until he bumped the back of her throat. Spit gathered fast. She pulled off with a wet gasp and dove back down, sloppy and eager, drool slicking her chin and his balls, one hand pumping what she couldn't swallow. Sullivan groaned, fingers in her hair, guiding rather than forcing, and the dirty talk poured out.

"Choke on it. Look at you, drooling all over my cock like you were built for this. Best friend on her knees, begging to be used. You want it dirty? I'll fuck every hole you offer and leave you covered in cum and my marks. Suck it deeper. Show me how bad that nympho mouth wants it."

Brigitte moaned around him, the vibration shooting up his spine, and took him deeper, eyes watering, throat fluttering. Her eyes stayed locked on his, hungry, daring him to finally unleash everything he had been holding. She pulled back just enough to beg, voice wrecked, spit on her lips.

"Don't hold back. Fuck my face, then fuck me like you've been dying to. I'm not going to break. I'm going to take all of it and ask for more."

She swallowed him again, sloppy and relentless, and his restraint frayed to a thread.

Sullivan hauled her up, firm and sure, and she rose willingly, mouth wet, eyes blazing. He stripped the tank top off, kicked his pants the rest of the way off, and shoved her shorts and panties down, leaving her naked in the lamplight, tits heavy, nipples tight, pussy already glistening. He backed her to the couch, bent, and latched onto her left breast, sucking hard enough to bruise the soft skin while his tongue worked her nipple. Brigitte cried out and held him there.

"Mark them. Suck harder."

He did, obsessive, moving from one tit to the other until dark hickeys bloomed across the curves and undersides. Then he went for her neck, sucking a claim just below her ear while two fingers slid through her soaked folds.

"Dripping," he growled. "This greedy cunt wants a real fuck, not the polite shit we did before. Say you want to be used."

"I want to be used. Fuck me. I'm so empty it hurts."

He spun her over the arm of the couch and spread her ass. He sucked a dark hickey into the meat of her right cheek, then another on the left, teeth grazing, until her skin blotched with his mouth. She pushed back, whimpering.

"Look at this ass. I've been obsessed with it. With biting it. With watching it bounce while I ruin you."

He drove his thick cock into her soaked pussy to the hilt. Brigitte's cry cracked open, pure pleasure, fingers clawing the cushion. The couch creaked under them. Her ass rippled with every thrust, the fresh hickeys shifting as he gripped her, and she shoved back to meet him, greedy, already chasing the next peak before the first had even faded. He grabbed her waist and pounded her doggy-style, balls slapping her clit, the wet sound obscene in the quiet apartment.

"Take every inch. This cunt was made to get fucked stupid. Listen to how sloppy you are, bent over your own couch and pushing back for more. Milk me. Show me that appetite."

"Harder. I'm going to come. Don't stop."

She came with a sharp cry, clenching around his thickness, slick running down her thighs. He fucked her through it, near-insatiable, one hand squeezing a marked tit. When her legs trembled he pulled out, flipped her onto her back, and shoved her knees up. Her huge breasts spilled and bounced as he slammed back in, and he watched them with open obsession, railing her mercilessly. Sweat slid between her breasts and he chased it with his tongue, sucking another dark mark into the damp skin before he drove deeper.

"Bounce for me. I could stare at these tits getting fucked all night." He sucked another hickey onto the inner curve of each breast, never losing his rhythm. "Feel how deep I am? Nobody else gets me like this."

Her second orgasm hit while he pounded her, back arching, cunt spasming around him. She wasn't finished. Her appetite matched his stamina, hungry eyes finding his even as she shook.

"My turn. I need to ride that cock."

She shoved him down and sank onto him reverse cowgirl, his view full of her ass. She rode hard, taking every thick inch, ass slapping his hips. Sullivan slapped one cheek, sharp and stinging, then the other, watching the skin pink around the hickeys, then sucked fresh marks into the heated flesh between slaps. Cum and sweat made the slap louder, and she moaned at the sting like it fed her.

"Ride me like the cock-hungry slut you are. I'm marking every inch of this ass. You wanted me unleashed. Take it."

"Yes, slap it. I'm coming again. Don't tap out on me. I can go all night."

She came a third time, thighs shaking, gripping him so tight his vision blurred, and still she rolled through it, sweat on her spine. He pulled her off with a wet sound and turned her onto her knees.

"Open. I need that throat again."

She opened eagerly. He fucked her mouth at the same merciless pace, one hand in her hair, the other on a bruised tit. Spit ran down her chin. She moaned and took it, eyes up, one hand rubbing her clit, and came a fourth time around her fingers, the cry muffled on his cock.

"You want every drop?"

"All of it. Cover me. Make me a mess."

He stroked his thick cock and came in heavy pulses across her tits, her throat, her open mouth. She licked him clean, milking the last drops onto her tongue. Sweat soaked them. Cum gleamed among the hickeys. Within minutes he was hard again, and she met that near-insatiable hunger and dragged him further. On the rug he fucked her on her back, those huge breasts bouncing, then took her from behind, slapping her marked ass while she came twice more. Her appetite pulled another orgasm out of him. He spilled deep in her soaked pussy while she begged, clenching around every spurt until he was shaking, every drop finally drained in a sweaty, cum-covered marathon that left them both wrecked and satisfied.

Sullivan collapsed beside her on the rug, chest heaving, cock finally soft against his stomach, lungs burning in a way no other woman had ever managed. Brigitte lay sprawled in the lamplight, tits and ass and neck covered in his dark hickeys, skin streaked with sweat and his cum, thighs slick where he'd spilled inside her. He turned his head.

"You're the first," he rasped. "The only woman who's ever fully sated me. I thought I was endless. You actually emptied me."

Brigitte's mouth curved, wicked, and the gleam in her eye was nowhere near done. She looked at his spent cock, then back at his face, and purred, "We're just getting started."

She caught his wrist and pulled him back on top of her right there on the living room floor, spreading her cum-slick thighs and guiding his thickening cock to her swollen, dripping cunt. Her nails dug into his shoulders, dragging him down onto her marked, messy body, already rolling her hips up to grind her soaked cunt against him.

"Get hard and stuff that thick cock back in my used pussy. I want another load leaking out of me while you suck fresh hickeys all over my tits."