COLE

My stepsister Sam had always been trouble, but after two years away at grad school, she came back changed — colder, sharper, and impossibly hotter.

I was in the living room when she walked through the door, dragging her suitcase. At 26, Sam was tall, athletic, with long dark hair, piercing green eyes, and a body carved by confidence. Tight black jeans hugged her long legs and firm ass. Her cropped top showed a sliver of toned stomach.

“Cole,” she said, voice low and amused as her eyes raked over me. I was 22, still living at home, softer and more bookish. “Look at you. Still my sweet little...