“Marilyn,” he said, voice low and rough like gravel. “Tell me to leave. Say the word and I’m gone.”

I couldn’t say it, instead I swallowed hard, my breath shaky. “You heard me with him… every time?”

“Every fucking moan.” His thumb traced a slow circle on the back of my hand. “I’d lie in bed, cock in my fist, imagining it was me buried inside you. Making you scream both our names.”

Heat flooded my face. I shifted on the bed, the short black dress riding higher up my thighs. His eyes dropped again, hungry. “Cas… this is insane. You’re my stepbrother.”

“Stepbrother,” he repeated, leaning closer. Our thighs...