I use Vicks Vapo rub on things I don't want the pups to chew on. The only thing, I have to wash my hands very well or they avoid me too.
ONLY if it's a wall hanging, suggest she put one spot on the bottom back of it. I guess that's only a suggestion if the dog can reach the wallhanging. It only takes a teeny tiny spot to be effective
I would suggest the Vicks to her for other things that should not be chewed, she might welcome the suggestion