He learns about Peggy's pregnancy during the confession of Peggy's sister, Anita, and he appears to take an interest in bringing Peggy more fully into the church community.
Don's first encounter with Rachel, in the pilot, is at a meeting where he pitches the idea of using coupons to attract more customers to the store.
She has a noticeable limp as a result of polio and a sister named Patty Susan Leslie , in whom the real Don Draper was interested before he married Anna.