I don't have any good things to do at school, but when I get home, I can see my sister's defenseless body as much as I want! Furthermore, every night I secretly get excited by playing with my sister's body while she sleeps soundly. Since she doesn't wake up no matter what I do, my actions escalate! I can't hold back and insert my dick and thrust it slowly... it feels so good that I cum inside her! When my sister wakes up, instead of getting angry at me, she gets horny! This time, she asks for my dick herself, slams it in at high speed, and gets on top in a cowgirl position, asking for cum inside her many times.