Peggy tells her mother she and Abe are shacking up – Episode Seven, 'At the Codfish Ball'
A live-in sex partner or a cat? Which would you choose? If it were up to Peggy Olson's Catholic mother, Katherine, it would be the latter. After Peggy announces that she and her political journalist boyfriend, Abe Drexler, are planning to move in together, Katherine berates her daughter for "selling herself short." But the underlying issue that emerges from this conversation is the fact that traditionalist Peggy, who initially wished Abe had proposed, is willing to risk "living in sin" because it means she won't be alone. It's not like the alternative her mother offers is any better: "If you're lonely, get a cat."