Exploring such sensitive issues such as divorce, sexual harassment, and child custody, The Good Mother is not the science-fiction/fantasy film you might expect Spock would be involved with. In fact I wonder if Mr Nimoy was contractually obligated by Disney/Touchstone to direct this film after his success with Three Men. Nonetheless, I'm sure Spock the Vulcan - ever curious about human behavior - would find the film and the issues it explores compelling. Diane Keaton, who plays the lead, is very good as a recently divorced mother with a new lover played by Liam Neeson. Complications arise when the lover is accused of sexually abusing her daughter and she's sued by her ex-husband for custody of the child.
I especially enjoyed seeing veteran stars Ralph Bellamy and Theresa Wright in this film; they play Keaton's wealthy grandparents who live in a lovely New England waterfont home. My favorite part of the film is when Keaton has to explain her plight to them and asks to borrow money to pay for the legal expense (her lawyer is played by Jason Robards). Ms Theresa Wright needn't say anything - her wonderful presence alone exudes warmth, compassion, and love. Upon its initial release in 1988, critic Roger Ebert gave the film only one star in his review (Read review here), but praised the scenes with Bellamy and Wright.
The movie, overall is OK, but kind of melancholy. I think Mr Nimoy handles the subject matter sensitively and tastefully, and brings out the best in his actors, given the subject matter; Liam Neeson is especially convincing, and sympathetic.
I am interested in learning more about the making of this film, and/or any interviews with Mr. Nimoy about directing this movie. If anyone knows or has any more information, please let me know; I would appreciate any feedback!

Film legends Theresa Wright, Ralph Bellamy, and Diane Keaton in The Good Mother

Academy Award winners Diane Keaton and Theresa Wright