I have elderly, extremely vulnerable parents. Both in their 90s, both with chronic breathing difficulties.
My sister's washing machine recently broke down, and I have found out that she has been going to my parents house to use theirs.
It started with them staying out of the room when she was there, but they have been finding reasons to go in for a chat and now do so as standard.
My sister works in factory which constantly has to close due to repeated outbreaks of covid. She uses public transport to get to work.
I have asked her to stop going, and told her I will pay for either her to use a launderette or I will buy her a new washing machine which I can do, comfortably (she can't into mine as my child is extremely vulnerable).
She has refused both, and has made it clear she will keep going to our parents' until her friend can come and have a look at her washing machine in a few weeks. She does 2-3 loads a week. I know she doesn't wear a mask.
We had an argument. I became annoyed and called her a selfish f*cking idiot. Now she won't talk to me at all.
Don't think there's much else I can do. Is there?