A childhood belief about under my bed

When I was little, I went to my grandma's house a lot. One day, my smaller cousin was there visiting too. He wanted to play with my toys but I told him no, and he started to cry. My grandmother sent me to her room to think about my actions. I was playing there with a small toy car, then it went under the bed. I reached for it and pulled out my grandma's dentures instead. I threw it across the room in fright and some teeth fell off. I started crying because I thought if I broke even some off, she couldn't use them anymore, and she would starve and die.