If David died May 28, 1946 -- is it a problem that on 16 Jun 1946 he is announcing his daughter's upcoming marriage?
https://www.newspapers.com/clip/25799829/the-boston-globe/
There's a December 23, 1946 article wherein "Mrs. David E. Cohen" (only, no Mr.) announces the marriage (which had occurred on December 15). I wonder if society items had to be submitted far enough in advance that he could have died between the submission (late May) and publication (mid-June)? Doesn't seem likely, but that's the best explanation I have so far.
Lois was checking to make sure we have our facts straight about David E. Cohen so we can be sure we have the right Sarah Cohen as well.
David Cohen's (presumed) date of death is on his gravestone, and the wedding announcement is easily found in the Newspapers.com database.
If David was still alive on June 16, 1946, then we have an inconsistency if the gravestone says he died on May 28, 1946.
In this case, I think the answer is probably that either the announcement was submitted just before his death, or the newspaper erred in saying "Mr. and Mrs. David E. Cohen" and should only have said "Mrs. David E. Cohen". But we should verify this.
Mitchell, we're trying to figure out who Sarah's parents were.
I think, based on some records from Lithuania, that Sarah Bloom Cohen's mother might have been named Rokhe Feige in Yiddish. So in English she might have been called Rose or Rachel or Fanny or Frieda or Frances or any number of other names. What I haven't found is confirmation of the mother's maiden name.