ATHA for estranging myself from my family because they believed and welcome into their home my false accuser?

Ten years ago my wife and I took in a homeless girl whom was friends with our daughter. We treated her like our own daughter and even introduced her to others as our daughter. We placed her on our health insurance and she was even one of the beneficiaries on our life insurance. Long story short - my newly divorced nephew took an interest in her and they married. All was well for two years after I walked her down the aisle. She even gave birth to a son. My wife and I had a marital crisis (my fault) and suddenly I became a “groomer” and I had been “inappropriate” in my affections. She even texted my daughter and told her that she believed I was a pedo and to “watch” me around my grandchildren. I have went no contact for 5 years now. My family celebrates holidays with her and I’ve become the villain.