Martha Roggers is Richard´s mum, she lives with him and her granddaughter Alexis after her previous husband absconded with all her savings. She is an actress on and off Broadway. Besides she´s trying to make her son a chance with Beckett, this could be specially seen in season 3 episodes Knockdown & Knockout.
When her son was a little boy she told him at every of his birthdays that he is adopted, the next moment she screams "April Foul", because it was the 1st of April. She doesn´t know or more she doesn´t want to tell her son whos´s his father.