Shh! Sister's Secret [Mature]

When the narrator is a child, he was living at his grandmother's home because of family circumstances. One day, his cousin came to visit, and the narrator remembers how lonely she looked when her uncle left. The narrator tries to comfort her, saying that he used to hold his "dick" like this when she wanted to pee. He tries to stroke her, but she keeps stroking it. He realizes that she's about to start cumming on his face, and he realizes that he has to help her.