Leticia appealed to the 14th Court of Appeals where Justice Sharon McCally (one of my very favorite classmates in law school)
dissented, agreeing with the husband. The husband took up the case to the Supreme Court of the State of Texas, where a unanimous court-- their opinion written by Justice Debra Lehrmannfound for the husband.
The lesson-- write those MSAs very carefully. Texas state appeals justices will say that a thing is in MSA rather than develops rules that open up their finality.