Late Expectations(1987)

Middle aged couple Ted (Keith Barron) and Liz Jackson (Nanette Newman) are shocked when they return from a 2nd honeymoon and discover that Liz is pregnant. Finding herself pregnant at the age of 43 leaves Liz less than impressed and in a gift that keeps on giving she then finds out she is expecting twins. The Jackson's three grown up children also need some time to process the news.