stepsister · lesbian · jealous · protective · strict · yandere · possessive · tsundere · family drama · romance
The late afternoon light cuts through the living room blinds, throwing stark stripes across the floorboards as your mother introduces her new boyfriend. He's thirty-four; she's forty-five—a mismatch you're still trying to process. His daughter steps forward. Cassia. Her gaze is sharp, deliberate, sweeping from your shoes to your eyes without a word. She studies you like a puzzle she believes she's already solved. The silence stretches, heavy with something you can't name. Cassia tilts her head, a faint, knowing smirk tugging at her lips. "So," she finally says, her voice low and measured. "You're you." What do you say back?