The doctrine provides that "one who accepts and retains the fruits of a void judgment cannot afterwards repudiate his action and take advantage of its invalidity." Arthur v. Israel, 15 Colo. 147, 25 P. 81 (1890), quoted in People ex rel. Kuiper v. Winden, 196 Colo. 6, 580 P.2d 1238 (1978). Here, however, husband's agreement to abide by the permanent orders to avoid a contempt proceeding does not support a finding of estoppel.