Joan and her enormous rack come to take on Jane and her slightly less-enormous rack, and you'd just need to put them in leather catsuits to have a sci-fi fan's wet dream. Joan repeats what she told Paul, and when Jane tries to deny it, Joan replies, "I'm not in the habit of making empty accusations." Jane then tries to say that the boys made her do it, which makes me think anything out of her mouth is a lie, not that Roger's going to care either way. Joan is live to the fact that Jane's lying, though, given that Jane's status as Don's secretary gives her sway even over the boys, and her boobs seem to be growing even larger in anticipation of her victory. Jane then completely switches tacks and snottily tells Joan she doesn't need a mother, and it's nice of her to say exactly the right things to make me want to stand up and cheer when Joan cans her psycho ass. Jane can't believe it, but she had to learn that Joan, much like her rack, is for real.
Betty comes outside and gushes over the new ride, and she and Don hop in together. He seems genuinely pleased at her enthusiasm, and she adds that he deserves it, as he works so hard. She then brings up Jimmy's party, which Don didn't yet know about, and speculates that Jimmy likes talking to her. However, since she's not showing any skin, Don doesn't get upset, and Betty suggests they take a ride. Don: "Not in here." Heh.
Jane's carrying her things, but instead of heading to the elevator, she goes straight to Roger's office. She knocks and enters, and tells him goodbye. Roger says that "Draper's a tough desk," but when Jane tells him it was Joan who fired her, he offers her a drink and the opportunity to tell him what happened. She gets a little teary as she says she's just trying to do her job, and Roger tells her that Joan is going through a tough time. "She's engaged, you know." Heh. Jane convincingly quivers her lower lip and Roger finally manages to elicit her address from her ("Jane on Jane Street. It's a pretty picture") and then tells her to go home and come back on Monday, and the whole thing will have been taken care of. Joan does not strike me as the type to forgive, let alone forget, so you'd think Roger is offering to directly intervene. The fact that he doesn't makes me think either that he doesn't find Jane all that attractive, or, far more likely, he's starting to lose it. Not being aware of this at this moment, though, Jane thanks Roger effusively, and leaves.