Sally becomes convinced that her entire family have all become sex mad; Peter has shown an interest in painting nude models at the art class, Jane is sharing a sauna with her boyfriend, Peter is requesting a polaroid camera to take pictures of his girlfriend ... and David arrives with pictures of naked women!

When Sally starts to become even clumsier than normal, the she begins to worry about her failing eyesight.

When Aunt Betty arrives, she announces that her husband Frank's business trip to the North is the ideal opportunity for her to let her hair down and have some fun...