You probably already know this, but Marie Wright's marriage record to Ernest Sweet in 1933 says it's her first marriage. https://www.familysearch.org/ark:/61903/3:1:3QS7-L93H-HS7T-3...
Also see the front of that page.
Something doesn't fit though re: her saying it's her first marriage? If Ralph were illegitimate I doubt there would have been that birth announcement. Also, do you know when Marie began her teaching career? I think that if a teacher had an illegitimate child back then, she would have been fired.
It's POSSIBLE that the first marriage was annulled and thus legally "erased."