Am I Responsible Deceased Mother-In-Law's Debt After Husband's Death

[Tony72]

My question involves insurance law for the state of: New Jersey

My mother recieved a medical bill for her Mother-In-Law's (My Grandmother) hospital bill from when she died 3years ago, my father past away this past October. Is my mother responsible for her Mother-In-Law's debt?

[LawResearcherMissy]

No, she is not. She did not contract the debt.

[Tony72]

What if my mother contract to pay my father's debt?

What if my mother contract to pay my father's debt? And he contracted to pay his mother's debt?