And be it further enacted, That in case by any Will any Real or Personal Estate shall be charged with any Debt or Debts, and any Creditor, or the Wife or Husband of any Creditor, whose Debt is so charged, shall attest the Execution of such Will, such Creditor notwithstanding such Charge shall be admitted a Witness to prove the Execution of such Will, or to prove the Validity or Invalidity thereof.