In Gruber v. Castleberry, 23 Ariz. App. 322, 324, 533 P.2d 82, 84 (1975), the Court found that Gruber was bound by a lease renewal for his office space that his wife had signed. Although Gruber had never expressly authorized his wife to act as his agent in carrying out the business affairs of his medical practice, his wife "paid the office bills, signed the rent checks, signed the lease and signed the renewal notice on behalf of herself and her husband." Id. Accordingly, the court found, "by permitting his wife to conduct these business activities, Dr. Gruber impliedly authorized her to act as his agent in executing the renewal notice." Id.