Good going, salome. You were paying attention!

Isn't part of the question, WHY does Don cheat on Bets? It has never seemed to be the obvious (sex), as she is generally surprisingly responsive in that area. I think there have been so many references to Don's love-less childhood, that it seems that he is really seeking love & acceptance so sorely missing from his past. And Betty is totally unable to give that love to either him OR the children.

Weiner even played the song "Where is Love?" at the end of a recent episode. What's so sad is that Don doesn't even seem to know that's what he's seeking, and keeps going for the image of family harmony (now shattered) over actual familial affection.

Did anyone else think at first when Don told Joanie that he would need a hotel room, and could she set that up, that he meant a hotel room for him to stay at, i.e., a home? Then, when the gang is all in there, with Trudy being the den mother bringing the sandwiches, Don looks genuinely happy -- is this is his real family?