Contract of guaranty does not automatically fall under obligations that redound to benefit of family

Dear PAO,

During our marriage, my husband acted as a guarantor for Dindo's debt. After the untimely death of my husband last month, the creditor, unable to collect from Dindo, told me that he would file his claim in the settlement of the estate of my husband. According to the creditor, it is presumed that the debt was redounded to the benefit of our family when my husband acted as a guarantor for the debt of Dindo. Is this correct?