You call your sis and ask to find something in your room, but when she comes in there, she finds that your whole desk in covered with napkins, dirty in your cum. She seems to be annoyed, but you can hear, that she keeps smelling those napkins. She calls you prevent and drop the phone, but she stays in your room, cause indeed the smell of sperm drive her crazy, she just can help herself, but have to masturbate right in your room, wetting her grey shorts and all of your floor. How good that you have hidden cam in your room, and can see everything.