Even assuming that the witness was an expert, however, the trial court clearly would not be bound by her opinion because custody is a judicial determination.  In re Milovich
 There was no error with respect to the exclusion of a psychologist from respondent’s witness list, where the record indicated that the mother sought to add the doctor as a witness long after discovery was closed, trial was underway, and ten witnesses had already testified, the attorneys for petitioner and the children objected to the witness had not been available earlier, not did she explain why it was necessary to belatedly call in another psychologist after apparently deciding not to submit testimony from the court appointed psychologist.  In re Milovich