But as Jenna looks toward a future that seems to be falling comfortably into place, Michael starts seeing his options dwindling and his life becoming irrevocably scripted. He panics and looks for something to redirect his course.

That's the main plotline in "The Last Kiss," a funny but painful observation of relationships written by Paul Haggis, the director and Oscar-winning writer of "Crash," and directed by Tony Goldwyn ("A Walk on the Moon"). Michael flirts with college student Kim (Rachel Bilson) at a wedding, ignoring his conscience and reality.

If a girlfriend is pregnant in a duplex and he's not around, is that really his life?

"The Last Kiss" also involves Michael's friends: Chris (Casey Affleck), miserable in his marriage; Kenny (Eric Christian Olsen), who is single-handedly reviving the one-night-stand aesthetic of the '70s; and Izzy (Michael Weston), who's trapped in a family business he wants no part of and ignored by an ex-girlfriend he still wants.

Also weighing in with their own relationship problems are Jenna's parents, Anna (Blythe Danner) and Stephen (Tom Wilkinson). Jenna thinks their marriage is rock-solid, but Anna is about to shatter her illusions.