Thank you everyone for your support. I am just having a difficult time with it.

Unfortunately I have no way to contact her son (she never gave me his email address), so I can not ask him to intervene. I know that vet bills are expensive, but that comes with owning a pet... She is blaming me because I didn't take him to the vet soon enough and she says that is what killed him. He didn't exhibit the typical signs of a UTI (i.e. inappropriate peeing), so I didn't even think that was the problem. The only reason I took him in was because he had lost alot of weight, but he had lost some of it before he came to me.

I guess I don't understand why someone would do this. I am grieving for his loss and money isn't part of it