Difficult as it may be to imagine or believe, a few Catholics have actually heard that verse (since it's read in our worship from time to time.)
And those of us who have spent a little time with Greek think that Μενουν can't bear the freight you are asking it to carry, though it could bear the POSSIBILITY of that interpretation.
I would, myself, paraphrase the logion as "What you should say instead is, 'Blessed are they that hear the word of God and keep it.'" Which is to say, don't use a natural or family relationship with me as a distraction from your call to hear the word of God and keep it.
I did a radio show once on the Immaculate Conception. What I took 15 minutes to say was,"IF you're envious of Mary because of the special Graces she received, you need to remember that God has a special vocation and special graces tailor-made for you and only you."
IN any event nobody has "kept" the Word of God more intimately that Mary, and as soon as Jesus learned to talk, she heard it a lot.
Yeah, what you said.
;O)