That JAV

My sister, who grew up in an all-girls' school and has almost no contact with the opposite sex, is going to attend a co-ed university. Not wanting to be embarrassed in her college debut, she asked to practice with my brother's boku. At first, they only talked and held hands, but when she got close enough to him to get a glimpse of his chest, he got an erection! I was so excited that my sister wanted to practice with my penis! I never thought I'd feel like a woman with my sister...but I did!