Throw a card and now they want to sue me

my son's realtor came to my home with a card and gift.The way she has acted about many things I could not except the gift she asked me to at least take the card. I did, than she started in on how she is a proseccional and that I told the neighbor she was drama which is what the neighbor and I both agreed on. When I told her we both said it to called me a lier and that said my son and daughter in law was right when they told her I was a crazy bitch. I told her they would never say that and she said she a text msg. to prove it. I got mad and throw the card back at her and told her to get the hell off my property. I came in the house and called my kids right away and told them. They text her as to way she would say that and she claims she never did. I just lost my mom 2 weeks ago I can't take this.