I had become a guest at my brother's house to prepare for an exam. However, I found myself unable to focus on my studies due to my sister-in-law's flirtatious behavior. One day, while rummaging through her laundry and holding her underwear, I quietly masturbated, only to be caught in the act by her. She promised to pretend she hadn't seen anything, but in my excitement, I begged her, blaming my virginity, "Please, sister-in-law, do something about this," and showed her my crotch. Though she was confused, she eventually gave in to my insistence and slowly began to touch my crotch...
