An auburn-haired woman answers her phone and finds Rachel at the other end; she turns out to be her sister "Barbara," but I don't believe we've seen her before. After a mention of Barbara's daughter being asleep, Rachel tells her that she thinks she might have met someone, although he has "some serious limitations." Also, he's married. Rachel tells her sister that their Dad would hate him, causing the sister to sigh, "So he's not Jewish." I guess she missed the opening scene. Barbara tells Rachel it doesn't matter what their dad thinks, and learns that Don has a full head of hair and is sometimes funny, "after a couple." He's also sometimes a misogynistic asshole, such as when you first met, but that was way back in the first episode and I'm surprised I even remember it. Rachel confesses that her attraction to Don is getting hard to resist, although she wants to deny it, and sometimes in life, good things come, but there's no future in them. As her kid wakes up and starts crying, Barbara counters that she'd do anything for some romance right now. Well, knowing Don, he probably wouldn't have any problem with dating both of you at once.
Peggy is filing something when Joan comes up to her and tells her that Frederick would like her to put her "industrious little mind" toward coming up with copy for the lipstick campaign, although she won't get a raise and she'll have to do it on her own time. She turns to leave, and Peggy asks if she should thank the higher-ups, but Joan breezes that there's no need, as she was asked to tell her. "They were very specific about it." I'm guessing they were also very lewd about it. Joan strides off, and despite her chilly attitude, Peggy looks thrilled. I don't know, though -- does it make sense for Peggy actually to be writing copy? Couldn't they just have a lengthy, focused interview with her? It feels like the show is reaching to pit Joan against Peggy, but I'm not sure it's completely organic, here.