I wonder how much her family paid the the Sheriff to have this scheme in place. No doubt she’s taking it worse going back then she went the first time...which tells me she knew she was only going for 3 days.
I think you are right about her knowing it would only be for 3 days. I noticed that she was way to calm turning herself in considering how much of fight she orignally put up. I guess the sheriff got caught with his hand in the cookie jar, but he thought because he did the deed in the middle of the night no one would notice! Ha! Did he get a shock!