The Other Woman opens with SCDP in a flurry over working on the Jaguar account. One of the three main men from Jaguar, Herb Rennet, insists on a night with Joan in exchange with choosing the firm for the car’s ad campaign. In an act of desperation, Pete and others offer to pay Joan to entertain the gentleman for the evening. Have I lost my mind, or is SCDP prostituting Joan in this episode? It would be one thing for Pete Campbell, but another for all of the partners to stoop to this disgusting level.

And although Don, Roger, and Bert orginally dislike the idea, everyone but Don is on board. In fact, Don’s continued fondness for Joan appears when Don warns her not to go through with it. Don suddenly a man of integtity you say? Never. But while he’s fighting with Megan so much, he might as well protect the honor of Joan. But it was too little too late.

Joan’s bed hopping ultimately lands SCDP the Jaguar account-but at a price. Joan now has a percentage ownership in the company and is a partner, including awkward attendance at partner meetings from now on. Don gives her a long staredown when she shows up as a new owner as the partners gather to celebrate the Jaguar announcement. I can’t help but feel that Matthew Weiner and Co are really messing with the chemistry of the partners by inserting Joan, but since I don’t know where this is all leading, I’ll let it slide for now.

I’m really shocked and disgusted by this whole vignette. All over a car account?! And even more confusing is that 1) everyone keeps talking up the fact that Joan is married (didn’t she get served divorce papers? didn’t she want to leave Greg?) and 2) she actually agrees to do the deed! Is really that troubled by the divorce? Or worried about Kevin’s future? Does she want to take a victory lap and be partner THAT bad? It seems like a bit of manipulation on the part of the writers.

Meanwhile, Peggy saves the Chevalier Blanc account and Don does not give her the recognition she deserves. Don is nasty and cold to her, mostly due to the stress over the Joan prostitution situation. Peggy is fed up with Don, and SCDP. At this point, I sympathize with Peggy, snarky remarks and all. She has worked hard, and although she craves Don’s approval to a ridiculous degree, she’s earned it. When Don doesn’t put out, Peggy is left hanging, and it stings. Peggy’s professional growth has gone virtually unnoticed in a firm that awards Pete freaking Campbell a piece of the partnership.

Lane meanwhile is only interested in his check not bouncing, and suggests Joan takes a cut in partneship in lieu of payment for her future deed with the Jaguar man Herb Rennet. Lane eases the pain of his tactless move by suggesting he is interested in protecting Joan and her child’s future. Nice try, Lane. Check-gate is still in full force. You could practically hear Lane silently moan when Pete suggested forgoing the Christmas bonuses—AGAIN!

In today’s domestic abuse files, Don and Megan are still hot at (not for) each other. Megan gets a call back for a play and Don is happy about it until he finds out Megan might be rehearsing in Boston for three months. Subsequent childish argument ensues. Don only supports Megan when its convenient for him to do so. In fact, most of what Don does or doesn’t do is convenient, including marrying Megan in the first place. Meanwhile, Trudy forbids Pete from getting an apartment in the city even though, in his brilliant words it takes an “epic poem” for him to get home from work each day. If only Trudy knew what Pete’s train buddy was doing his NYC apartment. Will we soon see two marriages dissolve?

Peggy meets up with Freddy Rumsen for pie and gets and heaping helping of truth: she’s unhappy with her current role, and should move firms to find out if she can make it, and make it better elsewhere. Let Don see how he does without his right hand woman. When Peggy tells Don of her plans, Don is desperate to have her stay. When he realizes she is leaving for Chaugh, Don’s rival, and she cannot be persuaded to stay, Don is in tears. Don and Peggy exchange a long, heartfelt goodbye. Through all their trials, they have had a true friendship, a give and take partnership based on respect. Now that he is losing her, Don realizes what Peggy means to him personally and professionally. A cute little moment occurs at the end of the episode when Peggy walks out, things in hand, and the camera focuses on Joan flashing a knowing smile: yes, our little Peggy is all grown up.