Lately, when my stepdaughter Shiori has been having meals with me, she has been returning to her room without much food. Worried, I peeked in and found her at the table, playing with her crotch and twisting her hips. Watching Shiori as she clumsily stroked her private parts, I found myself engrossed and thrusting my finger into my vagina. Later, even though I knew it was immoral, I took a step into the bathroom where Shiori was bathing.