Under Bartlett Sher’s assured direction, all three actors deftly capture the play’s shifting tones. Burstein shines as Larry, an artist whose work may not always be in his parents’ best interests. Wanamaker’s Jean is happily resigned to her life, but she’s nobody’s fool. Irv, a salesman-turned-executive unceremoniously pushed into retirement, emerges as a fascinating figure. Credit Lane’s depiction that toggles back and forth from funny to poignant in a flash.