
While giving a toast, Greg uncontrollably blurts out that Pam is pregnant and that Jorge is his son before immediately losing consciousness. Later, when Greg denies knowing anything about Jorge, Jack still refuses to believe him and drugs him with a shot of truth serum. At the engagement party, Jack, who assumes that Greg knows about Jorge and has deliberately been keeping him a secret from Pam, introduces him to Jorge. Jack resumes his spying on Greg and sends Greg and Jorge's hair samples for a DNA test, while inviting Jorge to Greg and Pam's engagement party in hopes of getting Greg to admit he is Jorge's father. Greg answers a brief phone call from Roz, and Little Jack is let out of the playpen by Jinx and he glues his hands to a bottle of rum. Despite Jack's strict instructions to leave Little Jack to self-soothe, Greg is unable to stand listening to Little Jack's cries and attempts to cheer him up by hugging him and acting humorously, but inadvertently teaches him the word "asshole". Greg is left alone to babysit Little Jack, whom Jack has been raising via the Ferber method. Meanwhile, Roz, Bernie and Dina realize Pam is pregnant, but promise not to tell Jack. Isabel's 15-year-old son Jorge, who has never met his father and bears a striking resemblance to Greg, catches the attention of Jack. Bernie reveals that Greg lost his virginity to Isabel 15 years earlier. Jack again becomes suspicious of Greg's character when they are introduced to the Fockers' former housekeeper, Isabel Villalobos. Pam informs Greg that she is pregnant, and the two decide to keep it a secret until they are married. Later, Bernie accidentally injures Jack's back during a game of touch football.

The gathering gets off to a bad start when a chase between the Fockers' dog, Moses, and the Byrneses' cat, Jinx, culminates with Jinx flushing Moses down the RV's toilet, forcing Bernie to destroy it to save Moses. While Dina bonds with the Fockers, small cracks begin to form between Jack and the Fockers, due to their contrasting personalities. Once Greg, Pam, and Pam’s parents arrive in Miami, they are greeted by Greg's eccentric but fun-loving and amiable father, Bernie Focker, a lawyer-turned-stay-at-home-dad, and Greg's mother, Roz, who is a sex therapist for elderly couples. Rather than going to the airport as planned, Jack decides to drive the family to Miami to meet Greg's parents in his new RV. They first fly to Oyster Bay, New York, to pick up Pam's father, retired CIA operative Jack Byrnes, her mother Dina, and Pam's infant nephew, Jack “Little Jack” Banks. Two years after the events of the first film, Gaylord "Greg" Focker and his fiancée Pam Byrnes decide to introduce their parents to each other.
