I think the bible has some instructive words for dealing with parents.  Sometimes they can be difficult or irrational.  I like the words Honor Your Parents.  It does not mean follow, obey, or agree.  It means a reasonable amount of respect and self-control, but you can also maintain your own beliefs.  So if you're a woman and your mother makes a comment about weight, you can listen, graciously say I am going to go in a couple of minutes and will call later.  You try to control your emotions, do not attempt to remake her, but also do not feel compelled to take abusive words, or let her dictate how you feel.