Kim's Obsession, My Gain - Cover

Kim's Obsession, My Gain

Copyright© 2026 by Incrediblehunk77

Part Nine: The First Time

Incest Sex Story: Part Nine: The First Time - 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  

Rob pushed forward, slowly, carefully, feeling Katie’s tightness resist him for a moment before giving way, her body opening to accept him, her walls clenching around him as he sank deeper, inch by inch, until he was fully seated inside her, until he could feel her heartbeat around his cock, until they were joined completely.

Katie gasped, her eyes wide, her mouth open in a silent cry. She was so tight, so hot, so perfect that Rob had to fight not to come immediately, had to focus on her, on making this good for her, on not hurting her.

“Are you okay?” he managed, his voice strained, his body trembling with the effort of holding back.

“Yes,” Katie breathed, her eyes finding his, shining with tears that weren’t from pain. “Yes, you’re—it’s—I’ve never felt—”

“Move,” Kim instructed, her hand on Rob’s chest, feeling his heartbeat, feeling the connection between them. “Slowly at first. Let her get used to you.”

Rob pulled back, just an inch, then pushed forward, and Katie moaned, her hips rising to meet him, her body learning the rhythm, learning the pleasure. He did it again, and again, slowly building a pace, watching her face for any sign of discomfort, any indication he should stop.

But there was none. Only pleasure, only wonder, only the dawning realization of what sex could be, what it should be, when it was with someone who cared, who knew what they were doing, who wanted her to feel good.

“Touch her clit,” Kim said, her fingers finding her own as she watched them, as she ground against Rob’s thigh, seeking her own release. “Make her come on your cock. I want to see it. I want to see my baby come with a man inside her.”

Rob’s hand found Katie’s clit, still sensitive from his mouth, and he stroked her in time with his thrusts, feeling her get tighter, wetter, more responsive. She was panting, moaning, her hands gripping the sheets, her head thrown back, her body arching to meet him.

“Rob,” she gasped, and he knew she was close, could feel her walls fluttering around him, could feel her orgasm building. “Rob, I—I’m gonna—don’t stop—please don’t stop—”

“Come for me,” Rob groaned, his own orgasm approaching, his control fraying. “Come on my cock, Katie. Let me feel you. Let me—”

Katie’s orgasm hit her like a wave, her body convulsing, her walls clamping down on him so hard he could barely move, her cry loud and unrestrained, filling the room, filling his ears, filling his heart. Rob kept stroking her, kept thrusting, drawing it out, and then he couldn’t hold back anymore, his own release crashing over him, his cock pulsing, spilling inside her, filling her with his cum, marking her as his, as theirs.

 
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