She is living in a delusional fantasy world. She likes living there. It is comprised of the perfect table setting and awesome family photos which are immediately loaded up to social media for all the world to see.
She does not dare show the immense heartache that she feels on a daily basis. Her perfect life kind of sucks and she has no one to blame but herself for settling in the first place.
She could leave but, then who would take care of her and what would she talk about at parties?
Tis best to stay and continuing living in Delusional Fantasy World.