Accused of cheating with brother in law
So 5 years ago my sister came out of nowhere and accused me of having inappropriate relationship with my ex brother in law.
A little history behind it all. My brother in law was basically a serial cheater to my sister for years. My ex brother in law and I have never been close, not even to the point of holding a decent conversation. I never cared for his behavior. My sister and I have an off and on relationship. She's always been extremely judgmental towards me. Examples like trashing my clothes or my hair style, my weight ect...
I haven't spent a whole lot of time around them except for holidays. A week before a holiday my adult daughter reached out and asked my niece what we were doing and she said " nothing, because your mom cheated with my dad" My daughter immediately called me and I said What!! I called my sister to confront her and she refuses to talk to me. I've texted her and asked why do you think this? Where is this coming from? I even paid $1500 for a lie detector test to prove my innocence. She has publicly put this all over social media and has said her & her husband divorced because of an affair with me. Although he has cheated several times throughout their marriage. I don't understand where this attack is coming from. I have texted her, show me your proof, why do you think this? And all she says is, I'm not going there with you.
I'm extremely hurt and devastated by this. My family is in complete shock and I thank God my husband doesn't believe this accusation. Just wondering what else or if there's anything I might do.