That's a tough problem, and there is no easy answer.  They are not legally obligated to let you look at the Will or any of their other estate planning documents - and their lawyer cannot show them to you or discuss them with you without their express permission.I suggest that you ask them to let you know where they keep the documents even if they won't show them to you.  Try to make them understand that you will be under a great deal of stress if something happens to them, and not knowing where the documents are will just exacerbate the situation.  Maybe they'll listen to reason (but don't count on it).