The issue of contractual waiver of the right to seek a decrease or increase in child support is not before this court. However, other courts have dealt with the issue: Underwood v. Underwood, 902 S.W.2d 152 (Tex.App. — Houston [1st Dist.] 1995, no writ); Giangrosso v. Crosley, 840 S.W.2d 765 (Tex.App. — Houston [1st Dist.] 1992, no writ); Leonard v. Lane, 821 S.W.2d 275 (Tex.App. — Houston [1st Dist.] 1991, writ denied). Subsequent to his 1987 divorce from Dorothy Farish, George Farish remarried, and a child was born of this marriage.