The Marie character is quite a narcissist and a bully. She manipulates people with guilt trips and forces her opinions on other people, and then when someone tries to call her on her actions and gain some space, she takes it like she is being personally attacked or the family is being destroyed.
Narcissists take advantage of the fact that people around them have a sensitive conscience, while they seem to have none.
Using the example of the show how does everyone think that people should deal with a character like Marie, as Debra deserves some space, although, she seems to be quite the henpecker, and Ray is always in trouble.
By the way, I am forced to watch the show, when I visit some elderly people.