Sensing she was genuinely agitated, Ron was quick to defend his part in the shower. Even if Pam was going to be mad at Beth and Sue, in some sort of twisted logic, given all that had happened so far on this trip, he didn't want her to think he'd cheat on Amy like that. So he said, "Well, I had no choice because Beth put that little makeup chair from the vanity in the shower, and used these same handcuffs to fasten my wrists to the chair legs. Plus, like I said, I was so drunk I only remember flashes of what happened."
As Ron divulged more and more...