How valuable is it as an object to hang in the house? If it has a lot of value to your aunt, then just leave it on the wall.
If it's okay with her, and she understands that it may break and won't miss it, then string it up with a new Dacron string. If you use the old string and it breaks, the shock of that could also destroy the bow.
Exercise it: draw it multiple times in increments of 3” or so until you get to full draw before you shoot it. Shoot only heavy arrows in it: 10 gpp or more.
Obviously, if there are any cracks, etc., that you are worried about, then it would be best to send it to BW to inspect before you shoot it.