HEIRS OF TERESITA VILLANUEVA, substituted by her legal heirs, namely: ELSA ANA VILLANUEVA, LEONILA VILLANUEVA, TERESITA VILLANUEVA-SIPIN, FERDINAND VILLANUEVA, and MARISSA VILLANUEV A-MADRIAGA vs. HEIRS OF PETRONILA SYQUIA MENDOZA, represented by MILAGROS PACIS, and the co-heirs of PETRONILA SYQUIAMENDOZA, namely, TOMAS S. QUIRINO, represented by SOCORRO QUIRINO, VICTORIA Q. DEGADO, CESAR SYQUIA, JUAN J. SYQUIA, represented by CARLOTA (NENITA) C. SYQUIA, and HECTOR SYQUIA, JR., acting through their Attorney-in-fact CARLOS C. SYQUIA