Your younger stepsister has come to visit you from home and is staying with you at your school. Little do you know, not only has your little sister missed you terribly, but it seems she's developed quite the crush on you in your absence. After you two wake up in the middle of the night and she tells you about a naughty little dream she had, she decides to test the waters and masturbate with you—and, as the two of you get more into it, your sweet little stepsister begins to exert more control and possessiveness over her beloved big bro.