imho, there isn't an unwritten rule in regards to bailing early
if she expresses her desire to leave early, then so be it
no point for her to stay if she's not going to give you the best service for the rest of the session
rather she takes her leave than for her to stay and give a sub par service
otherwise no one leaves the session a happy camper
you'll just have to suck it up and try someone else next time
tbh, we choose this hobby and pay for short term gain
overnight sessions are simply prolonged short term satisfaction
no hobbies comes without drawbacks
i'm afraid this is one of them
in my experience, only times i have successfully completed overnight stands is if i have had long term relations with the agent / papasan / mommasan
through the agent, repeat business is good business, its in their best interest to keep you happy
always report your experience so they know and make recommendations
no that they will do much for you if she was a lousy lay, but perhaps they will make an effort to find someone decent for you
sad to say, but better luck next time