Aunt Yuko, a relative, secretly seduces me

My mother fell while shopping and suffered a complicated fracture, and was suddenly hospitalized. My father was on a business trip and lives separately, so I ended up living with my older brother. Aunt Yuko came to visit us, worried about us and our brothers. Aunt Yuko has been a dream I've admired since I was a child, and even now that we met again after 10 years, my feelings have not changed. But I saw it. Seeing my older brother and old lady stack their bodies on the same futon...