We all know Brenda Strong played Cliff's one night stand in a season 10 episode of original Dallas, but do you believe the character was Ann Ryland? She didn't have a name in that episode, and the new series never addressed it. I believe it falls under the ambiguous category, similar to whether or not people believe Wes Parmalee was Jock. It came out during her trial that she picked up men while she was married to Harris, although she denied it. IMO, thinking of her running around on Harris with Cliff adds a little something extra to their one night stand. It would also have meant that Cliff slept with two of Bobby's wives since he slept with April that season as well.