The decedent’s former spouse was not a co-owner as a tenant in common, and had no ownership interests in the residence that had been purchased by the decedent and the spouse during their marriage, because they had divorced and their settlement agreement provided that the residence was to be transferred to the decedent by the spouse even though the transfer was never made. The refinancing of the mortgage on the property by the decedent was not a modification or novation of the agreement even though the spouse signed the mortgage because the decedent was the only one personally liable for the mortgage note. In re: Estate of Richard A. Martin, Deceased, 963 WDA 2023 (Pa. Super. 5/21/2024), (non-precedential).