Pointing to a man in a picture, Sunny said, “He is the brother of the husband of my sister’s mother”. How is Sunny related to the man in the picture?

Let's break down Sunny's statement step-by-step from the end:"my sister's mother" $\to$ This is Sunny's mother."husband of my sister's mother" $\to$ Husband of Sunny's mother is Sunny's father."brother of the husband..." $\to$ Brother of Sunny's father is Sunny's uncle (paternal uncle).Since the man is Sunny's paternal uncle, Sunny is the Nephew of the man in the picture (assuming Sunny is male, as indicated by standard gender context in these problems).