We get to anticipate Mrs. Arnold in 100 episodes.
"Norma Arnold (Alley Mills): Kevin's stay-at-home mother. Unlike her husband Jack, she is friendly and upbeat. She met Jack as a college freshman. When he graduated, she moved across the country with him and didn't finish college. She eventually gets her degree late in the series, and starts working at a software startup called Micro Electronics. She is shown to be more moderate (in contrast with her more conservative husband) and increasingly becoming bored and yearning to break away from her homemaker role hence reflecting the rise of feminism in the 1960s. (100 episodes)"