Sarah pushes

Tom’s breath caught as Sarah’s question hung in the air between them. The weight of her body on his lap, the heat of her bare skin against him through his jeans, made it impossible to think clearly. Her face was inches from his, her blue eyes—so different from the brown ones he’d known for years—searching his expression for an answer.

“Sarah, I—” he started, but she shifted slightly on his lap, the movement sending a jolt through him that made his words die.

“I can feel how hard you are,” she whispered, her voice carrying both teenage breathlessness and adult knowledge. “And I know you’re thinking about it. About how I look like her but younger. How I’m everything she was but better.” Her hips moved again, a subtle grinding motion that made him grip the couch cushions.

“This is wrong,” Tom managed, though his body was betraying him completely. “You’re my niece, you’re eighteen—”

“And I’m so fucking wet for you, Uncle Tom,” Sarah interrupted, her language shocking in its directness. The enhanced libido from his wish was clearly overriding any normal inhibitions. “I’ve been thinking about this all day. All week. Ever since I turned eighteen and realized I could finally do something about these feelings.”

She leaned closer, her lips almost brushing his ear. “Do you want to know what I think about when I touch myself at night? I think about you coming into my room, telling me how beautiful I’ve become, how much you want me even though you know you shouldn’t.”

Tom’s resolve was crumbling. The combination of her transformed appearance, the taboo situation, and her aggressive seduction was overwhelming every rational thought he had. She looked like his sister but felt like his wife, and the twisted psychology of it was driving him wild.

“Sarah, your mom really could—”

“Show up?” Sarah finished with a wicked grin. “That just makes it more exciting, doesn’t it? The idea that we might get caught? That Tonya might walk in and see her daughter riding her brother’s cock?”

The crude language from her eighteen-year-old lips sent another shock through him. This was definitely his wife’s sexual knowledge combined with the uninhibited desires he’d wished upon her.

“I can see it in your eyes,” Sarah continued, her movements on his lap becoming more deliberate. “You want this just as much as I do. You want to find out what it feels like to fuck your teenage niece. To take something you know you shouldn’t have.”

Her hand moved between them, finding the zipper of his jeans. “Let me show you how much I’ve been wanting this, Uncle Tom. Let me show you what a good little slut your niece can be.”

The coin was still somewhere in the bedroom, but Tom found himself wondering if he even wanted to change this back anymore. The woman in his lap was everything he'd ever fantasized about—young, beautiful, forbidden, and completely devoted to his pleasure.

“Please,” Sarah whispered against his lips. “Just once. Just let me have this one thing I’ve been dreaming about.”

Her fingers found his zipper, and Tom realized that whatever choice he made in the next few seconds would change everything between this Tom and this Sarah.