Okla. Stat. tit. 59, § 1925.12
If both parties to a marriage have obtained marital and family therapy by a licensed marital and family therapist, the therapist shall not be competent to testify in an alimony or divorce action concerning information acquired in the course of the therapeutic relationship unless a party relies on such information as an element of his claim or defense in such an action, or said information is gathered as a result of a court-ordered examination. This section shall not apply to custody actions.
Laws 1990, HB 2096, c. 166, § 12, eff. January 1, 1991.