it is against the clear weight of the evidence. "The trial court is entitled to choose which testimony to believe as the judge has the advantage over this Court in observing the behavior and demeanor of the witnesses." Mueggenborg v. Walling, 836 P.2d 112, 114 (Okla.1992). As the following analysis of the record demonstrates, there was evidence to support the trial court's ruling that Shawna Kahre should have custody instead of Greg Kahre. Implicit in this ruling, of course, was the trial court's determination that Shawna Kahre had not sexually abused her children.
Richard E. Sternlof, Ph.D. Greg Kahre and his mother, Jacque Kahre, consulted Richard E. Sternlof Ph.D., a clinical psychologist, on December 19, 1990, before Greg Kahre and Shawna Kahre separated. Dr. Sternlof prepared a report in April, 1991. Greg Kahre told Dr. Sternlof that he was considering leaving Shawna Kahre, was concerned about their three-and-one-half year old son, B.K., and wanted Dr. Sternlof to evaluate the child. When Dr. Sternlof asked Greg Kahre what he wanted to accomplish with the evaluation, Greg Kahre told the doctor that he wanted out of the marriage and wanted custody of the children. On January 15, 1991 Greg Kahre and his mother again saw Dr. Sternlof, who told them that it would be very important for Shawna Kahre to be involved in B.K.'s psychological evaluation. Later that day Dr. Sternlof saw Shawna Kahre for ninety minutes.
Greg Kahre told Dr. Sternlof that B.K. had recently been exposing himself, saying he wanted to pretend he was a baby girl. At one time B.K. had grabbed his penis, saying "I want to hurt this." According to Greg Kahre, Jacque Kahre had discussed B.K.'s conduct with her own psychological counselor, who told Jacque Kahre that B.K.'s behavior indicated that B.K. "might have been sexually abused." Jacque Kahre gave drawings to Dr. Sternlof that she said B.K. had made, which might indicate abuse. Nevertheless, Greg Kahre told Dr. Sternlof that neither he nor his mother had notified DHS that B.K. might have been sexually abused. Dr. Sternlof notified DHS, based on what Greg Kahre and Jacque Kahre had told him, because "such an action is required by Oklahoma law."
After interviewing Shawna Kahre once, and Greg Kahre, Jacque Kahre, and B.K., on several occasions, Dr. Sternlof found "no hard data suggesting sexual or physical abuse." Further, Dr. Sternlof observed that B.K. "has many negative feelings toward his father and none towards his mother." Finally, Dr. Sternlof concluded that the results of his evaluation of B.K. "are inconsistent with the allegations of abuse against the mother unless [B.K.] was trying to `protect her.'"
Cecilia Owens-Beckham, A.C.S.W., L.S.W., B.C.D. For reasons unexplained by the record, Greg Kahre and Jacque Kahre did not continue B.K.'s treatment with Dr. Sternlof, but sought another counselor for B.K.. After apparently considering several counselors, Greg Kahre and Jacque Kahre selected Cecilia *1361 Owens-Beckham, A.C.S.W., L.S.W., B.C.D., who, according to her testimony and report, first saw B.K. on March 1, 1991. Ms. Owens-Beckham,