Am I right to be a bit taken back by my sitter in law's behaviour?

Hi girls, I am hoping you can give me your honest opinion. My sister in law came to visit for one night. We went out together and had a lovely time. In the morning, I was making a full English breakfast. She was standing in the kitchen and chatting with me but didn't offer to help. She left straight after the breakfast, leaving everything on the table. When she was gone, I realised that she left the spare room in a mess not even made the bed. I was brought up to make sure offer my help when visiting people and always make sure I don't leave any mess behind me. Am I too harsh to be slightly disappointed in her attitude or is this just because my expectations are too high because of the way I was brought up? Am I too sensitive? Thanks for all responses x