I stayed at my brother's house for a job interview. Arriving near dusk, I was immediately drawn to my sister-in-law cleaning the balcony, her panties clearly visible through her skirt. The accidental upskirt view made my heart race with arousal. Even inside the house, she deliberately exposed herself while doing chores, fully aware I was watching. I grew increasingly excited, unable to ignore my throbbing erection. She noticed my reaction and seemed even more turned on. When heading to the bath, I couldn't resist grabbing her big ass and pressing my cock against her while my brother was away. She responded by passionately sucking me off in the kitchen while he was bathing. Late at night, I snuck into the master bedroom and caught her masturbating, openly teasing me about their sexless marriage. Later, she sneaked into my room while I slept, devoured my cock, and rode me until we crossed the final line. With my young, hard cock pounding her relentlessly, she couldn't suppress her moans, gasping loudly in pleasure.