Any mortgage executed and acknowledged by a trustee for a mentally ill married man or woman, appointed pursuant to the provisions of § 104 or § 105 of this title, shall be as valid and effectual to bar and divest his or her estate as tenant by the curtesy or dower interest in case he or she survives his or her spouse, as if he or she had been legally capable, and had in fact executed and acknowledged such mortgage; and any such mortgage, or the record thereof, shall be competent evidence in all courts of this State.