So basically she is blackmailing her saviour with the money she by any morals should have shared with him?
I Hope the author plans to make them enemies or something along those lines later, seeing how she is using him as a puppet and won't even give him "the equivalent of an egg sandwhich" When he got the entire crew + her out of that situation.
It is the equivalent of you saving someone from a gunfight and then when you wake up from the injuries they are like "Since you slept in my room to recover you are now my slave"
Would not fly in any way shape or form in any reasonable story, unless the girl is a complete psychopath in which case, get away dude