The Atlanta sun dipped low, painting the grand ballroom in warm gold as Lucy exchanged vows with Kelsey. Linda stood beside her sister in a soft pink dress that hugged her curves just enough to draw eyes without raising eyebrows. She smiled sweetly for the photos, the picture of the devoted younger sister. Family members cooed over how close the two girls had always been.

But the moment Kelsey took her hand for the traditional greeting, everything shifted. His palm was warm, his grip firm yet gentle, the kind of touch that belonged to a man who knew how to handle delicate things. Linda felt it instantly, a rush of heat blooming low in her belly and sliding between her thighs. She looked up into his face, tall and handsome in his tailored suit, and her mind betrayed her. She pictured those strong hands gripping her hips instead, that confident body pressing her down while his thick cock stretched her open. The image hit so hard she had to squeeze her legs together right there in front of everyone.

Lucy leaned in to kiss her new husband, radiant and oblivious. Linda kept smiling, but inside she was already wet, already aching. She had fucked plenty of men before, classmates, lecturers, even the neighbor who threw those loud weekend parties. None of them had ever made her react like this with just a handshake. Something about Kelsey felt dangerous. Something she knew she shouldn't want, but already did.

The reception blurred into laughter, toasts, and dancing. Linda played her part perfectly, chatting with aunts and uncles, helping with the cake. No one suspected the dirty thoughts looping through her head every time Kelsey glanced her way. She caught him looking once across the room, his eyes lingering a second too long on the way her dress clung to her ass. He looked away quickly, but not before she saw the flicker of something unguarded in his expression.

By the time the newlyweds left for their suite, Linda's body hummed with frustration. She rode back to the family home with her parents, making small talk while her mind replayed that handshake on loop. Later, when the big house finally quieted and she slipped into the guest room that would soon become hers, she couldn't wait any longer.

She locked the door, kicked off her heels, and lay back on the bed still in her dress. Her hand slid under the fabric, fingers finding her soaked panties. She pushed them aside and touched herself, circling her swollen clit with quick, desperate strokes. In her head it was Kelsey's fingers, then his mouth, then that thick cock she had only imagined pushing inside her while Lucy slept down the hall. Her hips bucked off the mattress as the fantasy sharpened. She bit her lip to stay quiet, but soft whimpers still escaped.

The orgasm built fast, tight and urgent. She whispered his name like a secret prayer. "Kelsey..." Her body tensed, thighs shaking as the release crashed through her, leaving her panting and slick.

She lay there afterward, chest heaving, staring at the ceiling. The guilt tried to creep in. This was her sister's husband. Freshly married. A respected doctor with a bright future. She should feel ashamed. Instead, a dark thrill ran through her. She had always taken what she wanted when it came to sex. Why should this be any different? Lucy had the perfect life now. Maybe it was time Linda claimed a piece of it for herself.

Her phone buzzed on the nightstand. A text from James, her old lecturer and occasional hookup buddy. He wanted to meet later that week for their usual no-strings session. Linda stared at the message, thumb hovering. Normally she would have said yes without thinking. Tonight the idea felt hollow. She typed a quick reply canceling, then deleted the thread. Right now she only craved one man, and he was downstairs in the master bedroom with her sister.

She rolled onto her side, still sensitive between her legs, and let her mind drift again. What would it feel like to sneak in there one night? To drop her robe and see if that handsome doctor could resist her? The thought made her smile into the pillow. Dangerous. Reckless. But the ache was already coming back.

Down the hall, Kelsey lay awake beside his sleeping wife. The wedding day had been perfect. Lucy looked beautiful, the house felt like home, and his future stretched out bright and steady. Yet he couldn't shake the memory of shaking Linda's hand. The way her fingers had lingered just a fraction too long. The way her eyes had darkened for a split second before she smiled that innocent smile.

He told himself it was nothing. She was family now. Young, lively, probably just excited for her sister. Still, the image of her in that pink dress kept resurfacing. The curve of her hips. The way she moved. He shifted under the sheets, annoyed at his body's reaction. This was not the night for stray thoughts. He pulled Lucy closer and tried to focus on her steady breathing.

Sleep didn't come easy.

Linda woke early the next morning, body still buzzing from the night before. She showered quickly, chose a simple sundress that showed off her legs, and headed downstairs. The house smelled like fresh coffee and leftover wedding flowers. She found Kelsey in the kitchen pouring a mug, hair still damp from his own shower. He looked up when she entered, and for a heartbeat their eyes locked.

"Morning," he said, voice low and careful.

"Morning," she replied, letting her smile curve just enough. She reached past him for a glass, letting her arm brush his. The contact sent another spark straight between her thighs. She could smell his soap, feel the warmth radiating off his body. In that moment she knew she wouldn't be able to stop herself for long.

She stepped back, sipping water, watching him over the rim of the glass. He cleared his throat and turned away, but not before she caught the slight tension in his shoulders. Good. Let him feel it too.

As the day unfolded with family lingering and wedding gifts being opened, Linda played the helpful sister perfectly. Inside, her mind raced with wicked plans. Lucy would leave soon for that big architecture project in DC. Three whole weeks. Plenty of time for a helpful little sister to get closer to her new brother-in-law.

By evening, when everyone finally cleared out and the house settled into quiet, Linda stood at her bedroom window looking out over the backyard. Her body still hummed with leftover need. She whispered to the empty room, voice soft but certain.

"He's finally going to be mine."

The words sent a fresh wave of heat through her. She didn't know yet how far she would go, or how much it would cost them all. But the spark had been lit, and it was already burning hotter than she expected.