After Mrs. Dietz (plaintiff) lost her husband, her son, Donald Dietz (defendant), took over as her financial advisor. Donald promised to care for Mrs. Dietz for the rest of her life if she bought a certain duplex and arranged for the title to be transferred to her and Donald as joint tenants. Mrs. Dietz bought the duplex, and the parties began living together in the duplex, with Donald caring for Mrs. Dietz. After Donald married Virginia Dietz (defendant), who also moved into the duplex, the relationship among the parties deteriorated. Mrs. Dietz moved out of the duplex. The defendants did not inquire after her and did not continue to support her. Mrs. Dietz brought suit, seeking to recover possession of the duplex. The trial court found a constructive trust and ruled in favor of Mrs. Dietz. Donald appealed.