After my older brother got married, his wife Sumi moved into our family home. She's a beautiful, capable wife who actively handles all the housework, but she doesn't pay much attention to her own clothing. Wearing just a tank top and a thong that keeps flashing her breasts while cleaning, my hot sister-in-law drives me, a teenage boy, wild with excitement. One day, she catches me masturbating with her used underwear... Without hesitation, she takes my 90cm thick cock deep inside her in doggystyle, violently pounding her womb with relentless thrusts. As my gorgeous yet filthy sister-in-law clenches her twitching anus and convulses in orgasm, I keep slamming into her, watching her firm ass jiggle with every stroke—experiencing the shocking thrill of forbidden creampie sex.