I have little doubt that it was 100 percent consensual. There's no felony here. He probably wanted more...either when it was filmed or subsequent to the filming.
He knew what he was letting himself in for and I am sure he was happy to undertake the punishment for the reward offered. With two such beautifully dominant women I would have offered myself up for treatment. I would have taken the option to be gagged because I know I would wimp out if I could and I know that later I would have wished that I took the complete punishment.