Desperate Sister Begs To Stay at My Place, but Things Went Too Far…

My stepsister got into an argument with our parents and needed a place to stay, so of course, she begged me to let her stay with me. I wanted to help her, but having a girl over is very inconvenient. I can't walk around my apartment with a hard dick every single day! Yet, she has ways to convince me to do anything for her. When I finally agreed to let her stay, the first thing she did was take a shower. When I saw how perfect her body looked, I knew how she would return the favor. If she wants to live with me, she needs to help with every single one of my needs...