Section 13 - Conveyance of separate propertyA. The husband or wife may convey, mortgage or make any contract relating to any real estate, other than the homestead, belonging to him or her, as the case may be, without being joined by the other in such conveyance, mortgage or contract.B. In the event a recorded conveyance of nonhomestead property has been executed by a married grantor without being joined by his or her spouse, said conveyance shall still be considered a valid conveyance of marketable title if one of the following instruments is placed of record:1. An affidavit executed by the nonjoining spouse stating that the property conveyed was nonhomestead property; or2. A conveyance executed by the nonjoining spouse, with or without others, relinquishing any claim to an interest in the property to the same grantee, or to a successor or successors in interest, with a recitation that the property was nonhomestead property.Okla. Stat. tit. 16, § 13