Medical marijuana

I’m not sure where else to post this but I’m looking for answers simply because I know nothing about it.

My mom just told me that she was approved for medical marijuana for her anxiety. I had no idea she was even thinking of applying for a card. But the problem is she watches my kids 3 days a week while I work. She currently isn’t watching them right now because I’m on maternity leave but I’ll be going back after the new year and I’m not sure I’m comfortable with her having marijuana (or cbd or whatever it is) in her system while watching my kids….

Like I said, I don’t know a whole lot about it…how would you feel? I’m not sure if she can use it after the kids leave and then she would be fine for them the next day? Or is it something that stays in your system long term? Is it even enough that she would be impaired?

I know she would keep it away from the kids so they couldn’t get into it but I just don’t know how I feel about it… I grew up being taught marijuana is terrible and illegal and a gateway drug and now that it is being more widely used, I’m not sure how to feel.

Please note I’m in no way disrespecting the pro-marijuana community… I’m just questioning if I should be okay with my mom watching my kids while possibly under its influence or if she can use it after they leave and they will be okay to go over there the next day? If anyone has any good websites to read about it that aren’t biased I’d appreciate that too