I think I’m living with a crazy person

My roommate recently opened up to me about her childhood. She told me she believed her kind mother (who I have met multiple times and can attest to her kindness) was poisoning her school lunches. She was also in highschool at the time. Which is insane because why is her mother making her lunches but that’s beside the point. She confronted her mother about weird tasting cheez its she found in her lunch. In return her mother went on strike from making her lunches. Need help asap what should I do??