In Anthony v. Anthony, 204 N.W.2d 829, 834 (Iowa 1973) a mother sought to enforce a child support judgment entered for the benefit of her daughter who was then an adult. The court found the mother knew of her right to child support for the seventeen years and failed to pursue it, leading the father to believe she intended to waive or abandon it. Id. The court found it obvious that the father had relied on this acquiescence and ruled the mother to be equitably estopped from enforcement of the child support judgment. Id.