Here Comes Happiness (1941)

Jessica leaves her upper class home to assume an anonymous working class identity She meets a blue collar guy Chet and falls in love with the poor but ambitious man Chet observes a series of suspicious clandestine meetings with her rich father and his chauffeur which makes him think she is stringing along a Sugar Daddy on the side Financial trickery and sequences of misunderstandings and coincidences culminate with a wedding that turns out much differently than planned