I have this devious plan to take the jewelry out of my grandma's vanity when she is showering.
Why do you want to take her jewelry?
I really like her jewelry and want to wear it myself.
It is wrong to take the jewelry from your grandmother. She will think somebody stole and report it. It would be better to ask to borrow it.
Nah, she's too old to care.
I highly doubt that, typically older women really care for their jewelry. I really do think you should just simply ask her to borrow it and it will turn out a lot better for you.