Seduced by My Brother-in-Law: A Cheating Wife’s First Forbidden Encounter – Part 1

Irica stood in the small guest bedroom of their Islington terraced house, smoothing the fresh duvet cover with nervous hands. The late October rain drummed steadily against the sash windows, the kind of persistent London drizzle that made everything feel intimate and enclosed. At 29, she still had the soft, curvy figure that turned heads - full breasts, wide hips, and a round arse that filled her jeans just right. But lately, those curves felt wasted. Tom, her 31-year-old husband, was a good man. Steady job in finance, kind eyes, decent in bed on the rare nights he wasn’t shattered from work. But decent wasn’t enough anymore. Not when the spark had dulled into comfortable routine.
She fluffed the pillows one last time and caught her reflection in the wardrobe mirror. Dark hair cascading over her shoulders, tight grey sweater hugging her chest, leggings clinging to her thighs. She looked good. Too good to feel this restless.
“Jasmine just texted - they’re ten minutes away,” Tom called up the stairs. “Patric’s driving. Traffic was a nightmare from the M25.”
Irica’s stomach did a little flip at the mention of his name. Patric. Her sister’s husband. Thirty-three, built like a man who worked with his hands for a living - broad shoulders, thick arms, a deep voice that always seemed to linger a second too long on her name. They hadn’t seen each other properly in almost two years. Family gatherings were always rushed, but she remembered the last Christmas party - how his eyes had drifted down her body when he thought no one was watching. She’d told herself it was nothing. Just imagination.
The doorbell rang.
Tom bounded downstairs. Irica followed more slowly, heart beating harder than it should.
The door swung open and there he was - Patric - soaked from the rain, white shirt plastered to his chest, revealing the hard ridges of muscle beneath. Water ran down his neck. His dark hair was messy, stubble shadowing his strong jaw. He looked even bigger and more commanding than she remembered.
“Alright, mate,” he grinned at Tom, clapping him on the back with one big hand. Then his eyes found Irica.
For a moment the hallway felt too small. His gaze travelled slowly over her - breasts, waist, hips - before snapping back to her face. A slow, dangerous smile curved his lips.
“Irica,” he said, voice low and warm. “Fuck me, you look incredible.”
Before she could respond he stepped forward and pulled her into a hug. His body was solid heat against hers. Rainwater soaked into her sweater as her full breasts pressed firmly against his hard chest. One of his large hands settled on the small of her back, the other just above the curve of her arse. He held her a heartbeat longer than necessary. She caught the scent of his skin - clean sweat, cologne, and something unmistakably masculine. A pulse of heat shot straight between her legs.
“Good to see you too,” she murmured, pulling back quickly before Tom or Jasmine noticed anything strange.
Jasmine, her 32-year-old sister, looked tired but elegant as always, rolling her suitcase in. “The flat’s a building site. Thank you both so much for having us this week. I owe you big time.”
They settled in quickly. Wine was poured. Tom ordered Indian takeaway. The four of them sat around the small dining table in the kitchen-extension, rain pattering on the glass roof above. Patric sat directly opposite Irica.
Conversation flowed easily at first - work, the renovation hell Jasmine and Patric were escaping, London gossip. But under the table, things were different. Patric’s long leg stretched out and brushed hers. At first she thought it was accidental. Then it happened again. And again. His calf rested against hers, warm and deliberate. Every time she shifted, he followed.
“You’ve really filled out nicely, Irica,” Patric said casually, eyes sparkling with mischief while Jasmine laughed at something Tom said. “Marriage suits you. Proper woman now.”
Irica felt her cheeks burn. She crossed her legs, but that only pressed her thigh more firmly against his. “Thanks,” she managed, taking a big sip of red wine.
Under the table, his foot slowly slid up her calf. The touch was electric. She was wearing thin leggings and could feel the heat of his skin through his socks. Her pussy gave a sudden, embarrassing throb. She was getting wet. Just from this.
The evening wore on. More wine. Laughter. Tom’s hand rested on Irica’s knee affectionately a couple of times, but it felt mechanical compared to the deliberate, teasing pressure coming from Patric across the table.
By midnight, Tom was yawning heavily. “Early start tomorrow, love. I’m heading up.”
Jasmine followed soon after, kissing Irica on the cheek. “Night sis. Thanks again.”
Patric stayed downstairs. “I’ll have one more drink and unwind a bit. Jet lag’s kicking my arse even though we only came from Manchester.”
Irica hovered in the kitchen, pretending to tidy up. Her heart was racing. She knew she should go to bed. Instead she waited.
The house grew quiet except for the rain. She went to the sink for a glass of water. Behind her, she heard bare feet on the tiles.
Patric stood in the doorway wearing nothing but loose grey sweatpants that hung dangerously low on his hips. His torso was bare - powerful chest, defined abs, a dark trail of hair disappearing into his waistband. The outline of his cock was clearly visible, thick and heavy even while soft.
“Couldn’t sleep?” he asked, voice husky.
Irica turned, glass in hand. “Just thirsty.”
He stepped closer. Much closer. The kitchen island was behind her. He reached past her for a glass, his bare chest brushing her arm, his hips grazing hers. She felt it - the heavy weight of his cock pressing briefly against her thigh through the thin fabric.
“Me too,” he murmured, eyes locked on hers. “Been thinking about this visit for weeks.”
Irica swallowed hard. “Patric… we shouldn’t-”
“Shouldn’t what?” He smiled, that cocky, knowing smile. “I’m just talking to my sister-in-law.”
But his body was saying something else entirely. He didn’t move away. The tension crackled between them like the rain outside. She could smell him again - that intoxicating male scent mixed with the faint trace of wine on his breath.
They talked in low whispers. About nothing. About everything. How marriage sometimes felt like a cage even when you loved the person. How routine killed desire. His eyes never left hers, dropping occasionally to her lips, to the swell of her breasts under the thin sweater.
At one point he reached up to tuck a strand of hair behind her ear. His fingers lingered on her neck. She shivered visibly.
“You’re trembling,” he whispered.
“I’m married,” she breathed.
“So am I.”
The words hung there, making everything worse. More exciting. Wrong.
His hand dropped lower, brushing the side of her breast “accidentally” as he pulled back. Her nipple was rock hard. She knew he felt it.
“I should go to bed,” Irica said weakly.
“Yeah,” he agreed, but neither of them moved for a long moment.
Finally she slipped past him, their bodies sliding against each other in the narrow space. As she did, his hand boldly cupped her arse for one second - firm, possessive, squeezing the soft flesh.
“Night, Irica,” he said softly.
She didn’t answer. She practically fled upstairs.
Tom was already snoring gently when she slipped into bed beside him. Her body was on fire. Her pussy was soaked, panties clinging uncomfortably. She lay there in the dark, listening to the rain and her husband’s breathing, thighs pressed tightly together.
Guilt washed over her. This was her sister’s husband. Tom’s brother-in-law. Family.
But the ache between her legs only grew.
Irica bit her lip and slowly slid her hand down under the covers. She was soaking. Her fingers found her swollen clit easily and she began to circle it, slowly at first, then faster. In her mind it wasn’t her hand. It was Patric’s thick fingers. Those rough builder’s hands pushing inside her. That heavy cock she had felt against her thigh earlier pressing into her instead.
She imagined him pinning her against the kitchen counter, yanking her leggings down, spreading her legs and thrusting deep while her husband and sister slept upstairs. The fantasy was filthy. Wrong. Perfect.
Her breathing grew ragged. She rubbed faster, two fingers slipping inside her tight, dripping cunt. She pictured Patric’s face - that arrogant, hungry look - as he fucked her. Claimed her. Filled her with his cum while she tried not to moan too loudly.
The orgasm hit her hard. She buried her face in the pillow to stifle the whimper as her pussy clenched and pulsed around her fingers. Waves of guilty pleasure rolled through her body until she was trembling.
When it finally subsided, Irica lay there panting quietly, fingers still buried inside herself, Tom sleeping peacefully beside her.
Down the hall, in the guest room, Patric was probably lying awake too.
This was only the first night.
And already, Irica knew deep down that she was going to let something happen.
She just didn’t know how far it would go.