Is the homeowner financially responsible for a dog bite injury on their property (one dog bit another dog) when the homeowner did not own either dog?

We had a party at our house. One guest asked if she could bring her dog. We said OK and allowed any guest to bring his/her dog. During the party, another guest's dog bit her dog (neither dog was leashed or supervised at the time of the bite). Her dog sustained an ulcerated eye, ultimately costing a total of $2300 in vet bills. We put both guests in touch with each other the day after the party so that they could work things out. The aggressor dog's owner did not pay the victim dog's owner anything for the vet bills. We felt bad for the victim dog and paid the owner $795 - the total vet bill at the time we paid. She has since gone on a social media tirade, drastically dramatizing the details and at times out-and-out lying about what happened. She is also very vocal about how we, as the homeowners, should be held responsible. She's indicating that because it was on our property we and/or our homeowners insurance should be required to pay the entire $2300 vet bill.