Kristine H. v. Lisa R

In Kristine H. v. Lisa R. (2005) 37 Cal.4th 156, a pregnant woman and her partner stipulated to a judgment that declared both women were parents of the child. After the couple separated, the biological mother tried to challenge the validity of the stipulated judgment. The California Supreme Court held that she was estopped from challenging its validity, reasoning that she had invoked the court's jurisdiction, stipulated to the issuance of the judgment, and enjoyed the benefits of that judgment for nearly two years. (Id. at p. 166.) "To permit her to attack the validity of the judgment she sought and to which she stipulated would '"'trifle with the courts.'"' " (Ibid.)