SAME-186 My Mom Remarried and Now I Have an Annoying Little Sister, But She's Super Cute and Bratty, and After playing Her, I've Become a Brocon. Amiri Saito

My mom remarried, and now I have a damn cheeky little sister. She acts all good in front of my parents, but the way she looks at me is clearly condescending. It's annoying, but at least she has a cute face! One morning, after everyone had gone out, I was secretly masturbating with my sister's panties, and when she came back to get something she forgot, she saw me...