(a) If a liability claim is made by a guest or passenger described by Section 1952.151 against the owner or operator of the motor vehicle in which the guest or passenger was riding or against the owner's or operator's liability insurer, the owner or operator of the motor vehicle or the owner's or operator's liability insurer is entitled to an offset, credit, or deduction against any award made to the guest or passenger in an amount equal to the amounts paid by the owner, the operator, or the owner's or operator's automobile liability insurer to the guest or passenger under personal injury protection.
(b) This subchapter does not authorize a direct action against a liability insurer if that right does not presently exist at law.