The show, which premieres Tuesday night at 9:30, is really about the unusual family situations that Kate encounters after she and Pete have been married for a year. She’s not especially maternal or good at homemaking, but she now has to act as stepmom and try to cook breakfast without burning the house down. She also has to deal with Pete’s ex-wives, each of whom is a trip and a half. Diane (Marcia Gay Harden) is a doctor and a humorless intellectual who tries to humiliate Kate; Jackie (Michaela Watkins) is a new-age flake. A day doesn’t seem to go by when one or both of them is somehow getting up in Kate’s face.
There is some vague promise afoot in the ensemble of performers; they’re all adept enough to build distinctive characters if they have the time and the backing of writers who know how to write for actors. Full story for BostonGlobe.com subscribers.