I have parents that live abroad and they normally come to stay for anything from 3 to 6 months. They normally stay with my sister. They are coming again soon (within the next couple of weeks) They have 'told' my sister that they are arriving and will be staying with her. She is distraught as this has been going on for years. They spoke to me and mentioned the fact that they would be staying at my sister's home but expect myself and other family members to 'do their bit' to help them out as they do not want to pay for a hotel.
I am very concerned for my sister as she has tried telling them that it is not possible for her to put up my parents but they have not taken any notice.
When my mother spoke to me on the phone about the matter I remained non-committal and simply listened to what she had to say about her plans for her accommodation. I did not fall into the trap of agreeing to anything I just listened then changed the subject.
What should my sister do?