PrincessMomma,
I've been in your position. Over ten years ago, after a lot of work, struggling and counsel, I drew a line in the sand with my own mentally ill mother. I told her that if she wanted to have a relationship and stay in contact, that we would need to go to counseling together.(I didn't even ask her to get treatment, just counseling.) If she couldn't do that, then we could not have contact.
She chose no contact. I know this because I have never received a reply.
That said, she has maligned me to anyone and everyone who would listen. *Her* reason I decided to end contact: because I was apparently so petty and mad at her for not giving me a Christmas present my grandma had sent to her address.
No, I'm not joking.:(
I have relatives who believe this to this day. I have one sibling from my mom's side of the family-- just one person--who actually believes that our Mom is lying. It took her several years before she finally saw the truth and cut mom out of her life herself, and it was only when my mother had gone truly beyond the pale. It's a horror story, but that's what it takes some people to see the truth.
The point of all of this is to say that you cannot control what people are going to say and think about you-- all you can do is control your own actions. I don't think that engaging with toxic family to do damage control will have any effect, other than feeding into the drama. It will frustrate you and rob your family of the peace you've gained by exiting that situation.
My sister took a while, but she *did* eventually figure it out. I did not send photos or short letters or anything like that. I kept my distance and when my sister contacted me, then I was able to connect with her. But until she had come to her own realization, anything I had said would have been met with denial.
So~
Throw in the towel if that means not engaging with toxic family or 'defending' yourself to them. Be the "black sheep", if that means living your life in a healthy way and making sound choices for you and your family. Hey, black is always in style and by not protesting, they'll eventually get the message that you've moved on. Onward and upward, mama! It really does get better.:) Believe me! Ten years from now, you will feel sooooo relieved and happier in this regard. EMBRACE THE FREEDOM WITH OPEN ARMS!!!
(besides, if they are going to believe some kid's story about you instead of coming to you-- let'em believe what they want. they just aren't worth it!)