A follow up to the question is an NDA binding for sex worker or escorts?
If someone hired an escort (or sex worker) and had her sign an NDA stating that she will not divulge their relationship, and that the client had hired her as an escort, would such an NDA need to be signed before each encounter or just the first one? Basically I'm asking what is the perpetuity of when an NDA applies to confidential information. For example you normally sign an NDA once for an employer at the start, but I guess with an escort it might be considered separate encounters each time.