Mollie is an accountant living in New York City who has an affair with Albert, a womanizing executive who is married with two children, and becomes pregnant. During her pregnancy, Mollie and Albert keep their indiscretion secret, under the idea she was artificially inseminated, and that Albert plans to leave his wife Beth and their two children to be with her. Mollie and her friend Rona happen to catch Albert fooling around with his interior decorator Melissa, and he admits he is planning on living with her after his divorce is finalized.
This time, a new baby is on the way, and it's a girl. Wrapped together with the standard conflict between mother and father, Mikey engages in a bit of sibling rivalry with his new sister.
With James now working as an airline pilot and Mollie suddenly without a job, it's up to the family dogs to run the show at home.