My step sister is working part-time at a maid cafe, but she's really nervous, so she asked me to be her customer service practice partner. When she shows off her maid outfit, even though I'm her brother, I'm not confident enough to suppress my erotic feelings, so I told myself that I was doing it for my step sister's sake and played the role of a very nasty, erotic customer. I got drunk and started messing with her, and even touched her butt and did whatever I wanted! I touched her so much that her panties got soaked, which made me so excited.