Later, Betty opens the door to the bedroom and looks in at Don. He's turned away from her, though, and she disgustedly exits. However, when she's gone, he opens his eyes. Oh, is someone not going to get a good night's sleep now? I'm so sorry!
Betty goes into the kids' room and lies down next to Sally. That is so freakin' sad I don't even know what to say about it.
In the morning, Betty's smoking at the kitchen table with the kids, still in the dress she wore the evening before. Don enters with a too-bright greeting, and Sally tells him Betty said the party was fun. Okay, scratch what I said earlier -- that is so freakin' sad I don't even know what to say about it. Seeing that his wife looks like hell, having had no sleep and also clearly been crying, Don does the caring thing: He leaves.