MIAA-609 When I was watched by my lover's sister

While my girlfriend was preparing for our wedding, I was waiting in the living room and her sister had come home in the morning. I was shocked by my lover's sister's super sexy outfit. Not only that, she also approached and provoked me. I care about her, but I can't bear to be seduced by such an erotic sister. I was addicted to the thrill and immorality as I actually received increasing provocations.