Mala is Sunita's aunt since she is the sister of Sunita's mother, Karuna. Thus, Mala is also Manish's aunt because siblings share the same parents, and therefore their aunts and uncles. If Mala has a brother, he would indeed be Manish's uncle, as he would be another one of Karuna's siblings, and aunts or uncles are the siblings of a person's parent.
If Manish is Sunita's brother and Sunita's mother, Karuna, has a sister named Mala who is unmarried and has no children, how is Mala related to Manish? Additionally, is Mala's brother (assuming she has one), also Manish's uncle? Make your response very short.