She first noticed him mowing his lawn shirtless on a Saturday afternoon, sweat running down his chest, and the thick bulge in his shorts swinging with every step. From her kitchen window, Lisa stared. Her husband was at work again, and that big cock next door looked like it could ruin her. Two days later she was knocking on his door with a bullshit excuse about borrowing sugar. He answered in loose shorts, no shirt, and she saw the outline of it right away. Thick, heavy, hanging down his thigh.
They didn't make it past the hallway. He pushed her against the wall, yanked her shorts down, and shoved two fingers straight into her wet pussy. "Fuck, you're soaked already," he growled. Lisa moaned and reached for his cock, pulling it out. It was huge, veiny, the head already leaking. She dropped to her knees and sucked him like she hadn't had dick in years. Spit ran down her chin while she choked on the fat shaft, loving how it stretched her mouth.
He fucked her on the living room floor that first time. Hard, fast, pounding strokes that made her tits bounce and her pussy squirt around his cock. She came twice before he pulled out and painted her stomach with thick ropes of cum. "Tell me you love this cock," he ordered. "I fucking love it," she gasped, rubbing his load into her skin.
After that, it became daily. Her husband left for the office and she was next door within minutes, pussy already throbbing. Sometimes he bent her over the kitchen counter and railed her from behind, balls slapping her clit while she begged for more. Other times she rode him on the couch, grinding down until every inch disappeared inside her, then bouncing until her thighs shook. She loved the way his cock felt when it bottomed out, the way it made her belly bulge slightly when he went deep.
One afternoon he had her on all fours on his bed, face down, ass up. He spat on her asshole and worked a finger in while his cock stretched her cunt. "You want both holes filled?" he asked. She pushed back onto him, moaning yes. He switched, sliding his slick cock into her ass while she fingered her own clit. The stretch burned so good she came screaming into the mattress, pussy dripping onto the sheets.
She started wearing skirts with no panties when she went over. He'd answer the door, see her nipples hard through her top, and just bend her over the nearest surface. One morning he fucked her standing in his garage, door half open, anyone could have seen. His cock slammed into her from behind, one hand over her mouth, the other rubbing her clit until she squirted down her legs. "Such a dirty fucking neighbor slut," he whispered in her ear. She came harder.
They got riskier. She let him fuck her in her own house once, bent over the marital bed while her husband was at the store. He made her lick her own juices off his cock afterward, then filled her mouth with cum right before she heard the garage door. She swallowed fast, wiped her lips, and smiled at her husband like nothing happened, his neighbor's load still warm in her belly.
Her favorite was when he made her beg. He'd sit on the couch, cock out, and tell her to crawl. She'd get on her knees, crawl across the floor, and worship that fat dick with her mouth and hands until he decided to fuck her. Sometimes he'd make her edge herself with just the head of his cock, rubbing it over her clit and pussy lips but not pushing in until she was shaking and pleading. When he finally sank in balls-deep, she always came instantly.
Late one night she snuck over after her husband fell asleep. He took her in the shower, water running over them while he held her up and fucked her against the tiles. Her legs wrapped around his waist, his cock driving up into her over and over until she was limp and dripping. He carried her to the bed still impaled on him and kept going until he flooded her pussy. She walked home with his cum leaking down her thighs under her robe, smiling.
They never talked about feelings or the future.

It was pure filthy need. She loved the way his cock looked sliding out of her, shiny with her cream. She loved the heavy slap of his balls when he fucked her hard. She loved swallowing him, riding him, taking him in every hole. Every time her husband touched her she thought about the neighbor's cock instead, and it made her wetter than she'd ever been.
It didn't stop. It only got dirtier, more frequent, more addictive. And Lisa had no plans to quit. Not when that cock next door kept her coming harder than anything else ever had.