You should sit down and have a chat with her about your concerns. Emphasize that you're worried especially because of the cancer running in your family. I'm sure she didn't want to resort to smoking so I'm sure she feels bad about it too. She needs your voice to help her since I know she's...
I'm not a fan of medieval or high fantasy settings but I love modern settings and lots of action. Mercenaries, vigilantes, war, survival horror, that sort of stuff.
I'm sorry for your losses. I lost my dad, brother, and lots of aunts from my dad's side from cancer so I know the hurt. It's not easy, I know.
Are you close to your mom? Do you guys talk often?