Beau and Mame enjoy a multi-year honeymoon traveling around the world—until Beau falls off the Matterhorn. Lindsay Woolsey schemes to provide Mame with a new project: to write her memoirs, with the help of a secretary, Agnes Gooch. . . .
. . . and of a “collaborator,” the amorous Brian O'Bannion.
O'Bannion ignores Agnes, but she dotes on him.
Patrick has met a special girl at college, and he wants her to meet his aunt—but not with O'Bannion around.
Needing a date for O'Bannion at a party Lindsay is throwing, Mame declares “Agnes! You're coming out!”
O'Bannion, who has thrown a tantrum, changes his mind after seeing the Gooch makeover.
Gloria Upson has Patrick enthralled.
Agnes returns from her night out: “I lived! I've got to find out what to do now!”
Clyde and Doris Upson, entertaining Mame on their patio, suggest that the perfect wedding present for Patrick and Gloria would be the housing lot next door—which would prevent “the wrong kind” of people (the Jewish cellist, Abraham Epstein) from purchasing it.
Mame is preparing to host a party for the Upsons, with a new apartment makeover by Pegeen Ryan.
The party includes flaming drinks: “The trick is to drink them up fast before all the alcohol burns away.”
The pregnant Agnes appears, to Patrick's horror, but Doris cuddles up to the “little expectant mother.”
More guests arrive: Vera, Ralph Devine, and finally Lindsay, who has the galley proofs of Mame's book. The party becomes a celebration of Mame's past, to the Upson's increasing confusion and horror. The last straw is the revelation that all proceeds from the book will go to the Epstein Home for Refugee Jewish Children in Mountebank.
Babcock accuses Mame of thwarting all his plans for Patrick's future. Mame responds “He's not little any more. And he's not mine. But he's not yours either. . . . I doubt very much that Patrick will allow you to . . . make him an Aryan from Darien! — and marry him off to a girl with braces on her brains!”
It's 1946, and Mame is home for a few days from an extended stay in India—and angling to take Michael, Patrick and Pegeen's son, back with her. “Auntie Mame said she'd love to have me, she said so right in there.”
Mame glows with new purpose: sharing the world with young Michael.
“My God, she's the Pied Piper!” Pegeen exclaims, but Michael only hears Auntie Mame : “Oh, what times we're going to have, my little love.”