This is exactly how I see it.
A girl once told me that she had a booking and the boss told her diamond service as she was heading towards the room, or at least she said she heard the boss say diamond. The customer had only paid for nuru massage and so when she entered the room she confirmed with customer that it was diamond. Of course the customer being a lowlife and seeing the opportunity said yes and they proceeded to do diamond service.
At the end of her shift she got paid and was short of what she was expecting and worked out that the first customer only paid for nuru. The boss denied she said diamond and didn't reimburse the girl and so the girl provided FS at no extra charge. Was the customer obligated to be honest? I guess this would be considered non-consensual if they are debating this.