Oh ty! :) Think you nailed with this one:
she went full-on paranoid
Thats how I see most of them/us.
My grandmother also picked all sorts of berries (besides mushrooms) and I remember how she would display them in jars - stating how many liters she gathered. Those are some very nice and fine memories.
They really are good memories.
The greatest satisfaction for her came when there were enough blueberries in an area to make a pie.
One year, there were two pies! Two! And some left over for pancakes.