Oregon Revised Statutes Crimes and Punishments § 163.565

(1) Proof that a child was born to a woman during the time a man lived and cohabited with her, or held her out as his spouse in a marriage, is prima facie evidence that he is the father of the child. This subsection does not exclude any other legal evidence tending to establish the parental relationship.

(2) No provision of law prohibiting the disclosure of confidential communications between spouses in a marriage apply to prosecutions for criminal nonsupport. A spouse is a competent and compellable witness for or against either party.