Months after their stage debut, they now have a baby boy and no steady income, and Jim expresses little interest in finding work or supporting the family.

After returning home and quarreling again with Sarah, he disappears with their young son Bobby, intending to sell him to the Ashmores.

She reconnects with Vanning, declares she is no longer afraid of any threats the Ashmores can levy against her, and again demands to meet the boy, saying a birthmark will prove her is her son.

Howard, who is now fully in love with Sarah, brings her to the house unaware of Bobby's presence, and finally engineers an encounter between them.

It offered as praise: "Sarah and Son is one of the few audible pictures which are really good enough to warrant criticism of the development of the story, and no matter what are its minor shortcomings, it is an emphatically ingratiating entertainment.