. . . "On October 25, 1975, they mortgaged both lots with the Development Bank of the Philippines (DBP) as collateral for a loan of P14,000.00.3 Five years thereafter or on September 1, 1980, spouses Mabanta sold the lots to Susana Soriano by way of a Deed of Sale of Parcels of Land With Assumption of Mortgage.4 Included in the Deed is an agreement that they could repurchase the lots within a period of" .