Jane and Jake had been married for twenty years. Until their divorce ten years ago when Jake left Jane for a much younger woman. Jane spent the intervening years rebounding from this and rebuilding her life and is finally in a place where she's happy with her situation and is doing things she's always wanted - like finally adding on to her house. Enter romance from an unexpected place--when she and Jake are in Manhattan for their son's college graduation, sparks fly and Jane is simultaneously aghast and pleased to find herself having an affair. With her ex-husband. In the meantime, it becomes clear that Jane's architect (Steve Martin) is interested in more than just Jane's blueprints.
I won't divulge more since you should see for yourself!! This is one that has a broad appeal - my husband and I loved it, as did my mother-in-law and her friend. In addition to the three actors I've already mentioned, John Krasinski (of NBC's "The Office") holds his own with these greats and offers strong comedic support.