She is Wonder Woman in this episode. From her instantly recognizing what's happening with the Big 3 when she, Phil, and Sophie got back from getting the coffee, to her herding the spouses to the cabin knowing the Big 3 had to do what they had to do ALONE, to her setting Phil straight after his (somewhat understandable, considering his short history as a Pearson) rant about Sophie's and Beth's joking around in the midst of all the heartbreak, to her cutting thru Randall's BS of only seeing his sibs as the weak screw ups of their youth and himself as the Savior, and reminding him (opening his eyes to the fact that?) those versions of his siblings just don't exist any more. I really hope everyone has a Beth in their lives.