Why is there no mention of Charlie Sheen's mother - what happen to her?

Charlie Sheen's mother, Janet Sheen, is a former actress and was married to actor Martin Sheen. While she has played a role in the lives of her sons, including Charlie, she tends to stay out of the public spotlight compared to her family. As a result, there is less media attention on her, which may explain the lack of mention in discussions about Charlie Sheen. She is still alive and has maintained a relatively private life.