I would call her into the kitchen then turn off her tank and speak really slowly and clear to be sure she can hear you
lol just kidding, That was an evil thought! hope I at least got a smile out of you...
Sometimes there are no easy ways of dealing with family
The only thing we have control over, is our reaction and forgiveness. She is not worth getting your family in an uproar over, if being a busy body is how she wants to spend the rest of her numbered days, I sort of feel sorry for her