Mina, my sister-in-law, came over to help with housework while my parents were away on a three-day trip. While she cleaned and cooked, I couldn't take my eyes off her voluptuous figure tightly wrapped in snug jeans, her big round ass constantly on display. The thong beneath kept peeking out, impossible to hide. Unable to resist, I pinned her down and pounded her from behind with fierce thrusts, her sexy ass jiggling enticingly with every move, delivering indescribable pleasure. After climaxing, I regretted my actions—but soon realized Mina was aroused too, deliberately flashing her thong to tempt me again. Her erotic allure was irresistible, drawing me back in without hesitation.