Answer: Family therapist
Explanation:
A family therapist operates within the context of a marriage and family. He/She uses the knowledge of psychology to assess, diagnose and treat issues that affects the psychological health (such as mental health) and overall functioning of a couple or family.
Family therapists studies the collaborative nature of family members in order to proffer solution to a problem being faced by an individual within the family.
Thus, the thinking of Mrs Lynn’s therapist is that of a family therapist, as the therapist is trying to understand the view of her husband in regards to her weight. This will give the therapist a better insight towards addressing mrs Lynn’s health condition.