The innocent grandchild and the promiscuous aunt

I had a memorable summer vacation that made me a real man. Due to work reasons, my parents sent me to stay with an aunt for a week this summer. My life completely changed when I accidentally spilled coffee on my pants, and Aunt Okita offered to help me change.

I later realized that she was staring at my erect penis. The next afternoon, I woke up to her touching me. I was intrigued and didn't realize the inappropriate nature of our actions, which was incest.