The aftermath of Rebecca's Thanksgiving pronouncement to the Big Three is shown this time from Kate's perspective, that perspective which also includes the two pool related items from the Big Three's past, the first day of pool day when they were six, and the three on site upon Kevin learning that the pool was closing for good. Departing the cabin for home, Kate realizes that she and Toby need some time together alone for them to rediscover what has obviously been missing from their marriage of late, which has only been exacerbated by the physical distance, hence Kate's suggestion that she spend a weekend in San Francisco with him and without the kids. As Kate spends the weekend with Toby in its ebbs and flows of emotions, they are, without Toby's knowledge, in the presence of a third which makes the weekend more difficult, namely the spirit of the "old" Toby who can't help but comment on the proceedings.
—Huggo