The Constant Woman (1933)

A mother abandons her family only to become a crispy critter with her lover, the husband finds out about it AND that his son isn't really his, becomes an alcoholic, is being held prisoner in a speak-easy, is rescued by 'Beef', is sobered up, gets a good job, negotiates a great contract for lots 'o money, realizes he's in love, asks the girl to marry him, son returns from boarding school and freaks out when told this, runs off and joins the circus that now happens to catch fire.....