What is the theme in A Chaste Maid in Cheapside by Thomas Middleton?

Marriage is a major theme in the book. In A Chaste Maid in Cheapside, it seems like everybody is either married or wants to get married. In fact, one marriage in particular, the intended marriage of Sir Walter to Moll Yellowhammer, creates the conflict in the play. Sir Walter has agreed to marry Moll and in return he has agreed to have Tim Yellowhammer marry his niece. This first arrangement also introduces the first deception.