What do I do?

My pig bit a neighbor. This 80 year old women walked with me before with my pets. She is the one who asked to walk with me. I even have a voice recording asking to walk with me. She was down street saw me returning from a walk. She called my name and approached me. She told me she just started walking again because of some medical issues. My pig, for no reason, bit her leg. She bled a lot because she was on blood thinners, I believe. I brought her to her house cleaned up her leg, and got neighbor to take her to hospital just to be safe. The cut was about 1/8th to 1/4th long on her shin. She called me after doctors, laughing about incident. 2 months later I received a notice from her attorney asking for my house insurance info. My insurance was dropped 2 months earlier. I confronted this woman in the grocery store, and she said it was her daughter doing this. Now 1 year later, I received paper. Me, my husband and homeowners ass. are being sued in excess of 15 thousand.