Just remember you are paying her wages and she is supposed to be acting as an agent for you. Be polite and see what happens. If she is rude, let her know the interview is over and you will not be doing business with her anymore and let her know you will be ringing her boss to tell him why. If there is any changes don't sign there are no changes on the original.
Hopefully you DH will be home when she comes.
All the best.