Was there ever a St. Thomas More high school?

Essentially I’m looking to get into contact with the school a family member of mine went to (graduated from hs 1985), but whenever I look up St. Thomas More Highschool the Houston branch only goes up to 8th grade, but I know my relative always made a distinction between their High school and St thomas Aquinas. I called the school itself and they assured me they’ve always only ever gone up to 8th grade, now I’m doubting my own memory lol.