Lately, my stepdaughter Shiori has been barely eating during our meals and retreating to her room. Worried, I peeked inside and found her at her desk, writhing her hips while fingering herself. Watching her clumsy hands caress her private parts, I found myself unconsciously thrusting my own fingers into my pussy, becoming completely absorbed. Later, despite knowing it was immoral, I took a step forward into the bathroom where Shiori was bathing.