Gf does drugs fairly frequently, is there anything I can do so she doesn't have a bad experience when experimenting?

My girlfriend frequently smokes weed and has started experimenting with ket and mdma, I don't smoke unless I'm out with her and she wants to with me, otherwise when we're together she stays sober. I'm just wondering what I can do to not be a prick and make sure she has a good safe time.

Also wondering about how to go about reminding her to do work when she would rather smoke, I'm worried about adding unneeded pressure.

Thanks and sorry if this is a dumb question, google and duckduckgo weren't giving me anything helpful