(previews start on May 1; opens on May 18) Medea is one woman who won't be receiving a mother's day card. Neither, perhaps, will Audrey Langham, an actress preparing the role. In this Nicky Silver comedy, directed by Mark Brokaw, Audrey (Linda Lavin) flees rehearsal only to be rebuffed by her adult daughter (Jennifer Westfeldt). Will Ms. Lavin, who made a recent splash in Mr. Silver's "The Lyons," roar again?