I had a similar situation in regard to a signer wanting to read EVERY WORD, as well as make a copy of Every paper she signed, despite having a copy of the whole package. It was a Refi.
I had gotten through the CD/ALTA/Note and was starting on the Mortgage when I realized I'd been there an hour already. (I normally complete a single signer refi in 45 minutes)
I did the spiel: "3 days to read and cancel....." but she insisted on reading every word. I was done. Called the company that gave me the job, told them I wasn't going to be there till midnight and what how did they want to proceed?
He spoke to borrower on phone. Told her appointment was over and she could take the weekend to look over all the paperwork at her leisure and when ready- reschedule.
I LEFT. They called me when she rescheduled - I passed. I got the full fee for the appointment I went to.
Don't waste your time in these circumstances- if they are reading every word with the first few pages, make it clear this is The Closing, signing is expected and if not, you are leaving as you have other appointments (whether you do or don't) Call the appropriate parties from the table, explain and go.