To resolve their doubts, they decide to host a dinner for their parents to meet. However, they are unaware that their parents are already intimately involved with each other:
Allen's father, a lonely man finding solace in a new friendship.
Michelle's father, who is struggling with the guilt of his affair.
, Sam (William H. Macy), is having a platonic but emotional connection with Michelle's mother , Grace (Diane Keaton).
, Monica (Susan Sarandon), is involved in a long-term affair with Michelle's father , Howard (Richard Gere).
Allen's mother, who is cynical and unapologetic about her choices.