MIL is obsessed with cats, though she won’t have one herself for various reasons (lives too near a main road, goes on holiday a few times a year, etc). Recently she’s started letting a new neighbours cat come into her home, it started in the summer when she would have the bifold doors open, and she seems to have grown quite attached. She’s now taken to buying cat food/treats and calling to it when it passes through the garden, letting it in and feeding it, and ‘accidentally’ keeping it in her home for most of the day, once it was overnight! I’ve spoken to her about it but she seems to think it’s funny and that she and this cat have bonded. She says she will keep letting it in as it wants to be close to her. I’m not sure what to do about it, we live about 30 mins away so I don’t know the neighbours in question (not that I think she does either). I don’t want her to get in trouble either.