Anonymous wrote:Why is she living with you? There are plenty of 23 yr olds who really shouldn't be living at home - for the sake of the relationship. If she has the money to "go off to live in a foreign country for a year", she has the money to have made other choices. She should renting somewhere (even if living in someone else's basement) and supporting herself. Nothing wrong with the bartender/late night lifestyle, but she needs to fully support herself so she knows what her decisions mean in terms of monetary lifestyle.
NP, and this isn't really helpful. Practically, I can see why she didn't get a place in May - many (most) places require a year lease, and if she knew she was leaving in January, easier to stay with mom. Also, although it wasn't my experience, I think a lot of kids move back in with their parents directly following graduation.
To answer your question, OP: a curfew is not really appropriate. However, it is your house, and it's not unacceptable to expect a certain level of decorum and conduct in the public areas of your house. Tell her she needs to keep it to herself if she's having a rough morning.