Cal. Family Code § 7540 : California Family Code — Parent And Child Relationship — Child Of Wife Cohabiting With Husband — Presumed to be child of marriage Date: 7 Sep 2016 TEXT PDF Current through the 2016 Legislative Session Except as provided in Section 7541, the child of a wife cohabiting with her husband, who is not impotent or sterile, is conclusively presumed to be a child of the marriage. Ca. Fam. Code § 7540