I'm troubled by my nerdy little sister's abnormal sexual desire... ~When I teased my sister,she started to sexually molest me...~ Urara Kanon PIYO-080

Overview： I teased my geeky sister who only watches anime and manga,saying she was gross... I guess I've upset her. I was wrapped up in duct tape and photographed in embarrassing poses... "Did your geeky sister touch your penis and make you get an erection?" "(Brother) I'll buy you anything,so please forgive me." "You'll buy me anything?...But I refuse!" "Wow,this is what it means to cum??" "This is the best "yes!" thing ever!" My sister's actions,who was curious about sex,escalated wildly. Before I knew it,I had become her pet,and I ended up cumming inside her.