(a) The respondent may plead as an affirmative defense to contempt for failure to comply with an order for possession or access to a child that the movant voluntarily relinquished actual possession and control of the child.
(b) The voluntary relinquishment must have been for the time encompassed by the court-ordered periods during which the respondent is alleged to have interfered.
Official text of the Texas Family Code as published by the Texas Legislative Council.