My stepbrother is the perfect submissive, provided the doors are locked. In the hallway this morning, I brushed past him without a word, my shoulder hitting his with a cold, calculated indifference. He didn’t even look up, playing the role of the estranged sibling to perfection. But as soon as the heavy oak door of my bedroom clicked shut and the bolt slid home, the mask shattered.

“Strip. Now,”

I commanded.

He scrambled, fingers shaking as he tore at his clothes. He collapsed onto the rug, completely naked, his chest heaving. I stepped toward him, the heavy heels of my boots thumping against the hardwood. I reached into my kit and pulled out a thick strap of black leather. The scent of tanned hide and musk filled the room.

“Kneel, you pathetic dog,”

I whispered.

He sank to his knees, head bowed. I looped the leather tight around his wrists, cinching them behind his back until his shoulders strained. I loved the way he trembled, a fragile, submissive creature under my thumb. I leaned over him, my heavy breasts brushing against his shoulder blades, the friction of my silk robe teasing his skin.

“Look at it,”

I ordered, gesturing to his crotch.

His dick was already hard, a thick, pulsing vein throbbing along the shaft. A bead of pre-cum leaked from the tip, creating a dripping cock that glistened under the dim lamp. I reached down, my palm slapping against his balls with a loud, meaty crack. He gasped, a sharp sound of pain and pleasure that echoed in the small room.

“Do you like being my toy, stepbrother?”

“Yes, Mistress… please,”

he whimpered.

I didn’t give him the release he wanted. Instead, I straddled his chest, my thighs pinning his arms. I guided his erection toward my mouth, tasting the salt and heat of him. It was a reward for not touching himself all week. I sucked hard, my tongue swirling around the head, creating a wet, squelching sound that filled the silence. I felt him jerk, his hips lifting off the floor in a desperate attempt to thrust deeper into my throat.

I pulled away with a wet pop, saliva stringing between us. I moved my body, guiding his dripping cock toward my drenched pussy. I lowered myself slowly, the head of his shaft pushing through my nether lips, just barely. I felt the friction, the slide of skin on skin, as I rode him with brutal intensity.

“You belong to me,”

I breathed, leaning down to bite his earlobe.

He was a broken, submissive mess, his eyes rolled back as I ground my clit against the base of his shaft. I felt his orgasm build, a violent tension in his thighs. When he finally blew, he let out a strangled cry, his seed pumping deep into me while I squeezed him tight, asserting my total dominance over his shivering, submissive form.

Tomorrow, we would become cold towards each other. But today, right now, he was my submissive stepbrother.