The correct answer to this open question is the following.
Although the question does not include options, we can say the following.
Esther is a psychologist who has been working for the past year as a therapist with one of the parents currently going through a bitter divorce. She would be ethically required to abstain from conducting a custody evaluation on behalf of the court in this case because it would be hard for her to remain objective.
As Esther has been listening to the issues of one of the parents during the process of divorce, one way or the other she could have some subjective approaches about the process in favor of her client. She is the therapist and a professional and has been listening to her clint's complaints and suffering through the process. That is why she should abstain from conducting a custody evaluation on behalf of the court in this case because it would be hard for her to remain objective.
