Man, sorry for all the little posts, but my boundary worked! I told W not to contact me about the piano again until she could speak civilly/politely (this as last Friday morning). She, of course, got mad and called me names, and I just ignored it.
So, today, I finally get: "Can you please let me know what's going on with the piano?"
Woohoo! It feels good to stand up for yourself! I will probably respond after a couple of hours, and maybe agree to move it into the garage or something.