Haha! Pretty sure Ben/Kimber is a total red herring, so I hope they'll whack us over the head with a super ridiculous Ben pairing. Plus, no way they introduced the incest vibes running gag without it having at least some relevance to the plot.

This being the son's first play constitutes his steps towards establishing himself and his creative identity. What if Donna used this life-changing opportunity for him to get herself her next Boy to support because she's losing hold of the old one? That might also explain why Ben's brother managed to team up so quickly with Loretta. Maybe Ben was about to drop him anyway because he'd found himself a wealthy patron?