The air in the shared bedroom crackled with unspoken tension. Charli, my stepsister, always had this way of making me sweat. Her oversized glasses, usually perched precariously on her nose while she devoured books, now seemed to amplify the mischievous glint in her eyes. She was wearing one of my old t-shirts, the soft cotton clinging to her impressive big tits. I knew I was staring, but I couldn't help myself.
"What?" she asked, a playful smirk dancing on her lips. Her voice was a low hum that sent shivers down my spine. "Never seen a girl in a t-shirt before?"
"Not like that," I mumbled, immediately regretting the words as her smirk widened. I shifted uncomfortably, trying to ignore the way my heart hammered against my ribs. The shared space felt smaller, more intimate. The air was thick with unspoken desire.
She padded closer, her bare feet silent on the wooden floor. I could smell her – a mix of vanilla and something else, something uniquely her. She stopped inches away, her big boobs almost brushing against my chest. My breath hitched.
"So, what is it about this t-shirt?" she whispered, her breath warm on my ear. "Is it the big boobs?" She reached out, her fingers tracing the curve of her breast under the fabric. I couldn't breathe.
My hand shot out, grasping her wrist. "Charli, don't," I managed to choke out, my voice raspy with lust and a touch of fear. This was wrong, forbidden. But God, it felt so right. I wanted her more than I wanted to breathe.
She pulled away slightly, her eyes searching mine. "Don't what?" she challenged, her voice laced with a hint of defiance. "Don't make you want me?" She dropped to her knees, unbuckling my belt. My big dick strained against my jeans.
“Oh god…”, I moaned as she slowly pulled my zipper down and released me. The hot stepsister began to stroke me slowly, up and down. Her eyes, magnified by her glasses, were locked on mine. "I want you," she whispered, "And I want you to cum inside me. I want your creampie."
She took me in her mouth, my nerdy girl stepsis, my step sis. A blowjob from her was a forbidden fruit, a taboo I couldn’t resist. I was a goner. Minutes later, lost in the heat of passion, I pulled the condom off and unloaded deep inside her, sealing our secret forever.