lol same thing just happened to me.Piper just died and i praised her for lying in repose and she got up and i kept praising her to the point that she got up in her old body and ran away very slowly (old age) and her ghost disappeared and then i tryed to get rid of it and then i got freaked out cuz it was just there walking about and i went to the menu and clicked on one of my other families and went back and then Piper re-died and i let her die lol