Welcome to Psych Central, Jennifer.  I'm sorry I don't think I have any personal advice I can offer you. However here are links to 6 articles, from Psych Central's archives, that (hopefully) may be of some help. (The first link is actually to a series of articles on the subject of dealing with difficult or toxic people):
How to Deal with Difficult or Toxic People
5 Manipulation Tactics Narcissistic Parents Use To Control Their Adult Children
11 Mandatory Rules for Dealing With a Narcissist
11 Ways to Set Boundaries with Narcissists
How To Heal From a Narcissistic Parent | The Exhausted Woman
https://psychcentral.com/blog/6-tips...amily-members/
I hope you find PC to be of benefit. 
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"I may be older but I am not wise / I'm still a child's grown-up disguise / and I never can tell you what you want to know / You will find out as you go." (from: "A Nightengale's Lullaby" - Julie Last)
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