Question

My mother is secular, unfortunately, and she buys non-kosher things.
Should I help her, given that the help would involve only a rabbinic prohibition while honoring parents is Torah-level,
or
“You shall keep My Sabbaths,” and what Rashi explains there: “The verse places Sabbath observance next to reverence for one’s father to say that even though I warned you about reverence for a father, if he tells you to desecrate the Sabbath, do not listen to him—and so too with all the other commandments.”