Sir Oliver decides that it is now time to draw up the marriage contracts for Sandfield & Grace and Philip & Jane. Lady Goldenfleece protests that Jane cannot marry Philip because she is, in fact, his sister! While everyone wonders what is going on, Lady Goldenfleece explains that Lady Sunset switched the girls when they were infants because she was worried that her husband would go bankrupt. Philip is overjoyed: the woman he is married to is Sunset's daughter, and not a relation of his. Sandfield is also overjoyed: he gets to marry Jane, the woman he really wanted to marry all along.