What do your mom and the twin towers have in common? They go down before you can say "inside job"
What are you implying with your mom compared with the twin towers? I don't know if this is acceptable.
That's just a shitty meme, ignore it. Mother's day has nothing to do with the twin towers.
You should never display a meme that has such wording on it, people who have been there and survived the twin towers can relive it through that. That makes things very bad for them mentally, so be extra careful next time.