Baines meets a girl-friend, Lucy Maitland, at the hunt ball.

His mother is coming to visit before going to stay with his sister so Jane poses as Lucy Maitland to put Mother off Harvey's new fiancee whilst Tom and Diana ham it up mercilessly pretending to be Baines' parents talking to Lucy. The result is that Lucy does not stay around and Jane has got her Baines back all to herself.

Diana is horrified to find that she is unaccountably in the red and goes up to London to cause a fuss, only to discover that all her investments have gone into receivership.

Back in Bayview, Tom's room is suffering from severe rising damp so Tom comes up with a solution that will sort things out for them both. They will live together in one large room. Diana accepts this but draws the line at being carried over the threshold.

Living together is not the bed of roses that Tom and Diana were expecting. He criticizes her sloppiness and her funny little ways, such as feeding acorns to squirrels with a sling-shot. She decides to move out and goes to stay with Sarah to be a nanny to baby Diana but this is not her forte.

Tom misses her, especially when Geoffrey decides to move in with him again.