NATR-462 Brother's wife Kyoko

I'm a part-time worker currently living with my older brother and his wife. My brother is a salesman working for a trading company. He's always busy meeting his quota, so he gets up early in the morning and comes home late. Sometimes he works long hours at overtime and doesn't come home at all. That's why I spend a lot of time alone with my brother's wife, Kyoko. Kyoko is beautiful and kind, and treats me like a friend. That was until I saw her like that...