Kim's Obsession, My Gain
Copyright© 2026 by Incrediblehunk77
Part Three: The Setup
Incest Sex Story: Part Three: The Setup - Kim, a driven single mother, has a new fantasy in her sights: watching her boyfriend fuck her 18 year old daughter.
Caution: This Incest Sex Story contains strong sexual content, including Ma/Fa Ma/ft Fa/ft Lesbian Heterosexual Incest Mother Daughter
It was a Friday night in October. The apartment was warm, the heat kicking on against the autumn chill outside. Katie had volleyball practice that afternoon and had come home around six, her hair still damp from the locker room shower, her cheeks flushed from exertion. She’d been wearing her practice clothes—spandex shorts and a tank top—and Rob had been sitting on the couch with Kim, trying to focus on the movie they were watching, when Katie had bent over to pick up her bag from where she’d dropped it by the door.
The shorts had ridden up. Rob had seen it—the perfect outline of her pussy, the fabric nestled between her lips, creating that cameltoe that Kim was obsessed with. He’d looked away quickly, his face burning, but Kim had noticed. Kim always noticed.
“Katie, honey, come sit with us,” Kim had called out, patting the cushion next to her.
Katie had hesitated, her eyes flicking to Rob, then back to her mother. “I should shower. I’m gross.”
“You’re beautiful,” Kim had said, and there was something in her tone that made Katie pause. “Come. Watch the movie with us.”
Katie had approached, her movements tentative, and sat on the couch next to Kim. Rob was on Kim’s other side, and he could smell them both—Kim’s rich perfume, Katie’s clean sweat and young skin. The contrast was intoxicating.
The movie played on, some action blockbuster that Rob couldn’t follow. He was too aware of Katie’s presence, of the way she shifted on the couch, of the glimpse of her pale thigh where her shorts rode up. Kim was playing with her hair, casual and domestic, but Rob knew her well enough to see the tension in her shoulders, the way her eyes kept darting between him and her daughter.
When the movie ended, Kim stretched, her tank top lifting to show her stomach. “I’m going to bed,” she announced. “Rob, you coming?”
Rob had nodded, standing up, trying not to look at Katie, who was still curled on the couch, scrolling through her phone.
“Night, Katie,” he’d said.
“Night, Rob,” she’d replied, looking up at him with those big brown eyes, and Rob had felt something shift in his chest.
Now, in Kim’s bedroom with the door closed, Kim was moving with purpose. She’d already changed into a silk robe, black and short, her nipples visible through the fabric. Her curly hair was loose around her shoulders, and her eyes were bright with that fierce energy that Rob had learned meant she was about to get what she wanted.
“She’s ready,” Kim said, opening her nightstand drawer and pulling out today’s acquisition—a pair of light blue cotton panties with a small wet spot in the center. “I took these from the bathroom while she was showering. She’d already changed into her sleep clothes, but she’d worn these all day. Smell them.”
She held them out, and Rob—who had given up resisting weeks ago—took them and brought them to his nose. The scent was stronger than usual, more intense. Katie had been very aroused today.
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