Whilst you have decided to stay which is your call - have you discussed with the owner about the daughter not having visitors when you are staying there ? You need to set some boundaries for your privacy.
There is another thread where the sitter on arrival found out that a third party ( a “very nice friend” ) was also living in the home but they now had visitors too .
The daughter at your sit could do something similar and invite a visitor(s) over - best to get it clear with the owner that there is a third party rule and that that won’t be acceptable for daughter to have any visitors while you are staying there.