It takes too long to get there but the finale is one of the funniest sequences I have ever scene. Moore's comic talents are put to perfect use. It helps that Reinking and Irving are both gorgeous! That said the basic premiss is kind of distasteful.
Leonard Maltin/Plot synopsis:
Dudley has a wife and a girlfriend--and they're both pregnant! Surprisingly warmhearted comedy that turns into old-fashioned farce. Runs out of steam somewhere along the line but benefits from winning performances by all three leads. Panavision.