If after the second time she begged you to take her back saying she won't do it again, and she did it again YOU should have realized that she is incapable of change and you will always be her person to abuse if you don't stop taking her back. How could you take her back when she is so disrespectful to your own parents (never mind you). This is simple. You leave her, you do not allow her to contact you in anyway, you get help for your codependency, white knight syndrome and your read these links so that you work on yourself while you forget about her and her mental issue(S).
http://www.womenslaw.org/simple.php?sitemap_id=38
^^^ This is geared towards abused women but it applies to you.
http://www.whatiscodependency.com/symptoms-of-codependency/
^^^ This will tell you about yourself.
http://www.outofthefog.net/index.html
^^^ This may help you and your immediate family to recovery.
Stop letting her hoover you back into her mental issues. She will not change without years and years of therapy. Get away and stay away from her and work on what ails you. You need to change within that what makes you stay and/or go back to someone like her.
I'll add one more link that pertains to what appears you need to work on within:
http://www.selfgrowth.com/articles/White_Knight_Syndrome_Subtypes.html
Please work on you and forget her.
Last edited by Wakeup; 06-10-13 at 02:31 AM.
Reason: added another link
“The willingness to accept responsibility for one’s own life is the source from which self-respect springs.” ~Joan Didion