Hammer House of Horror S01E08 - Children of the Full Moon

A couple head off on holiday to the West Country but get stranded. They find sanctuary in the woods where a woman cares for a number of children whom he believes to be werewolves. After an accident, the husband wakes in a hospital to be told the werewolf children were all a dream. However his now-pregnant wife has changed, developing a taste for raw steak among other things.