(a) Evidence of conduct of a parent not related to the factors in section 665 of this title shall only be admissible for the purposes of determining parental rights and responsibilities if it is shown that the conduct affects the parent's relationship with the child.(b) Reports prepared by a person qualified as an expert under the Vermont Rules of Evidence, evaluating the best interests of the child, shall be admissible for the purposes of determining parental rights and responsibilities provided that the expert is available for cross-examination.Added 1985, No. 181 (Adj. Sess.), § 5.