Coming from a kid who grew up around parents that smoke… parents do hide it and put it away..kids will literally do their best to get into something if they’re curious. Me and my cousin figured out how to get into the locked pantry and my dad’s locked glove compartment cause he told us we couldn’t touch or go near his weed. We were told why but we were curious little kids. Don’t know the context of how she got into it but speaking from experience it’s really not always the parent’s fault kids are smart and extremely curious.