The Mothers-in-Law

The bickering Hubbards and Buells are stunned when their kids return from a night out announcing they're engaged. After arguments about the wedding plans are finally settled (amid the kids breaking up over a fight about whose mother is right), the kids wind up eloping with another couple, while their parents are trying to rescue Kaye's beloved grand piano, set up in the Hubbards backyard for the next morning's nuptials, from a midnight rainstorm.

The Hubbards and the Buells show up at the same resort, and when their honeymooning kids unexpectedly arrive, having been rained out at their original destination, the in-laws spend a sleepless night together in a cramped room, giving the only other available room to the kids. Desi Arnaz, Jr. can be seen in a golf cart in the opening scene.

Eve and Kaye break their legs skiing and are bedridden in the same room.

Going to a store to return a duplicate wedding gift for the kids, the mothers, who have been banned from their own phones for continually calling the honeymooning couple, spend $15.70 talking to them on a payphone, unknowingly getting locked in the store when it closes. With only one dime left, they accidentally reach a sleeping bullfighter in Barcelona, whom they beg to relay their SOS to their husbands. Madness ensues when a security guards finds them trying on fur coats.

Checking out the place that the kids have rented, the mothers return their deposit and fix up the Hubbards garage apartment for them. After their snooping gets them caught hiding in the kid's shower, they promise not to interfere, but their curiosity gets to them when they see friends arriving for a dinner party. Peeking in the electric garage door windows, they wind up spending the evening lying atop the horizontal door after Jerry opens it for some fresh air.

To cut down on their wives meddling, Herb and Roger suggest that they get jobs. Realizing that all their suggesting, recommending, and advising might just be too much, they decide to try it. With Kaye's past signing career as Angelina Davina, The Little Girl with the Big Voice and Eve's youthful experience in local radio, they go to an audition for a revue at the hip Club Cabaret and work up a novelty act, calling themselves The Marvys. (Desi Arnaz, Jr. is seen playing the drums).

When Roger and Herb admit that they would date Liz Taylor if given the chance, their wives console each other at the Buell house, leaving their befuddled husbands to go it alone next door.

Jerry decides to major in dramatic arts, giving everyone the showbiz bug. Suzie and all four parents tune up to help him audition for the school musical.

When the kids in a financial bind, Eve and Kaye decide to help pay off Suzie's ring by selling Kaye's famous spaghetti and meatballs on the college campus.

A fugitive bank robber holds everyone at gunpoint at the Hubbards home, whiling away the time reciting poetry and playing gin rummy, and everyone hopes that Kaye's newly acquired karate skills will help them escape.

A physical-fitness kick has the Hubbards and Buells joining a cycling club, and they wind up lose in the desert.

Roger, wearing a Martian costume to test a scene from a new script, is arrested. Everyone comes to the rescue: The mothers and kids in animal costumes for a kiddie show, and Herb in his lodge outfit, resulting in a mad masquerade.

A surprise visit from Suzie's wealthy ex-boyfriend causes an uproar, with the mothers talking up divorce for the newlyweds, and the kids faking a divorce to teach them a lesson.

The Hubbards sell their old refrigerator to the Buells. When it breaks down, the Buells retaliate by launching a raid to steal the Hubbards new one.

A heated argument leads to Roger challenging Herb to a duel at dawn. While they practice with fencing foils, their wives conspire to stop the showdown.

Eve and Kaye team up to write a TV script, and wind up begging Roger for ideas, snapping at each other, and trying to retrieve their script, which they plagiarized, after Roger submits to it for them.

When their mothers interference becomes too much, the kids move out to a gloomy apartment, where the struggle and strain give them second thoughts.

The Hubbards and Buells work up acts to go to Mexico to be on a variety show hosted by their matador friend. Desi sings The Straw Hat Song with Desi, Jr. on drums; Eve and Kaye sing Turn Around.

The Hubbards and the Buells battle as they both want, and then don't want, the boat they won on a telephone quiz show.