Luisa Diaz (played by Rita Moreno) is Benny and Joe's estranged mother. She abused Benny as a child and Benny and George describe her as "old school". Luisa threw Benny out of the house when Benny was pregnant, but Luisa says that Benny left on her own. In the episode, "Super Bowl", it was said she was dead, but in a later episode she was alive and well.