This is a drawing from our Open Figure Drawing session in Binghamton, NY. This is pastel pencil on 12x16 Canson paper. It's a one hour and forty minute drawing.
Yes, if she wanted to get paid. They get breaks every 20 minutes and usually put their robe on and wander around a bit and look at the drawings for 5 minutes before they go back into the pose.
The models can break at any time. Usually they choose to sit still for 20 minutes and then get a five minute break, then resume the pose for another 20 minutes. The entire session lasts for 2 and a half hours. The models want to work. Obviously you are unfamiliar with the art world.