When I went to my best friend's house for the first time in a while, his sister, who had become a high school girl, showed up wearing only a bath towel! My eyes were naturally drawn to her big, swollen breasts, and my dick was rock hard and ready for battle! My reason collapsed and exploded when my sister started stroking my dick and inviting me. I stole my friend's attention and had sex with my sister in the room, living room, and all over the house.