Final answer:
Justin is likely experiencing role ambiguity with the introduction of a stepmother, as his previously established household responsibilities and role within the family are changing, requiring adjustment and clear communication.
Step-by-step explanation:
When a family undergoes changes such as remarriage, children like Justin can experience shifts in their roles and responsibilities, leading to a sense of role ambiguity. This term refers to uncertainty regarding expectations, behavior, and responsibilities in one's role within the family dynamic. In Justin's case, since he is no longer the only one responsible for tasks such as mowing the lawn, he may feel unsure about his new role and how his responsibilities have changed after the introduction of a stepmother.
Such changes can require a period of adjustment for everyone, as the family navigates the new family structure and dynamics. It is important for clear communication and definition of roles to occur to alleviate potential conflicts or parental conflict, and facilitate improved family dynamics.