Marta is Jorge's sister, and Jorge is married to Luisa. Jorge and Luisa have one child, a son named Carlos. Marta has a son as well, named Pablo. How are Luisa and Pablo related to each other? What is Marta's relationship to Carlos?
Provide a very short response.
Luisa is married to Jorge, who is Marta's brother. Pablo is Marta's son. This makes Luisa Pablo's aunt by marriage, as she is the wife of Pablo's uncle (Jorge). In relation to Marta, Carlos is her nephew since he is the son of her brother Jorge.