Micki + Maude (1984)

TV reporter Rob Salinger is married to Micki, but because she's always busy working, they hardly ever spend time together. One night after Micki stands him up again, Rob meets cellist Maude and they soon get romantically involved. When Maude becomes pregnant bu Rob, he decides to marry her. When he's about the tell Micki, she tells him that she is pregnant, so he doesn't have the heart to leave her, but he marries Maude anyway. Now married to two pregnant women who don't know about each other, Rob is busy looking after them both and keeping them from finding out about each other.