Pursuant to Chapter 882 Wis. Stats. an adult may be adopted by any other adult who is a resident of Wisconsin.  The consent of the adult to be adopted and the consent of the spouse of the adopting party, if that spouse has not joined in the adoption petition, shall be filed in writing with the Court.

After a hearing on the adoption petition, which may be held in chambers and which shall be attended by the Petitioner and the adult to be adopted, unless the Court orders otherwise, and after such investigation as the Court considers advisable, if the Court finds that it is in the best interests of the persons involved, an order of adoption may be granted, which shall have the same legal consequence as an order of adoption of a minor.