Bottom line, Watson hired women expecting to get sex off of them. Regardless if they were compliant or not, he at a minimum engaged in systematic prostitution.
You can make a case for sexual harassment too, but the prostitution is undeniable..
A. He hired them
B. He had them sign a non disclosure
C. He propositioned them for a sexual encounter as part of the job they were hired to do.
Maybe every one of them was a willing participant, but that doesnt clear him of wrongdoing... it just makes them wrong too..