My friend is 87 yrs. old with AFIB, bad eyesight and mobility problems. I have been living with her for the last 20 years and taking care of her for the last 12 years (fulltime, I quit my job to help her). Her son was renting a room in a house and the house was sold. He moved in with us without telling us he had an old cat. (We had never had animals in the house). The cat died and his mother told him not to bring another cat. He did, they were arguments. He does not clean after his pet. And then this cat died too yesterday. She told him NO MORE CATS...but...I am sure he will get one. She almost fell several times because the cat gets on her way. She is scare of them. What do we do?.