Juliet
I can just reiterate what I've pointed out in reply in the FDK in pt 13. As long as free will isn't impeded in any way (other than lust) on either party, sex is consensual. Clark was always in control of thoughts and therefore actions, if not his reactions. He could have stood up and walked out. He chose not to.
But since you like Mayson so much, I have part 15 for you now
Michael