Carmen is Stewart's housekeeper who also worked for Ben.
Carmen began working with Ben at his and Oliver's apartment when Stewart wanted to unload her because she had not been doing a very good job cleaning. Ben quickly figured out what Stewart had done when Carmen left the place less clean than when she started. Ben, as adverse to firing people as his father, struggled to let Carmen go. However, during the conversation, they noticed her squinting and figured out that she needed glasses and that's why she was missing messes. They got her set up to take care of it.
She is married. Her husband had a paper route.
She has a son, Hector, who uses crutches to walk.
She cares deeply for Stewart and Ben. When she mistakenly believed he was short on money, she offered him some of hers, even though she didn't have much herself.