Texas Civil Practice and Remedies Code - CIV PRAC & REM § 72.003. Effect on Other Liability

(a) This subchapter does not affect judicially developed or developing rules under which a person is or is not totally or partially immune from tort liability by virtue of family relationship.

(b) This subchapter does not relieve the owner or operator of a motor vehicle being demonstrated to a prospective purchaser or relieve a public carrier of responsibility for injuries sustained by a passenger being transported.