Final answer:
The initial positive outcome of treatment for a victim of sexual abuse by one parent is emotional relief.
Step-by-step explanation:
A nurse recognizes that an initial positive outcome of treatment for a victim of sexual abuse by one parent would be that the patient experiences emotional relief. This is because the emotional distress caused by the abuse can be alleviated through appropriate therapy and support. It is important for the patient to have a safe space to express and process their emotions, helping them to begin healing and moving forward.