Have already set boundaries in that when she starts, I let it go on for about 15 minutes, then something is said that usually strikes a nerve (mine). That's when I leave. How is that received? She starts crying then shouting at me to come back.

Last Friday, I actually became tearful and said I couldn't take any more. She didn't stop. So I got up to leave, repeating what I'd said. What I heard, even after shutting the door, was shouts of "you hateful drama queen" and "come back here".

Thanks for your valuable insight Rechu and I'm sorry you are experiencing the same. The one thing she keeps reminding me in all of this is "I'm your mother". So far have restrained myself from saying "well act like one then".