Surprise can sometimes be the biggest source of estate battles, so it is probably a good idea to talk to your family about your estate plan, according to Market Watch in "How to talk to your family about your estate plan."
Most people are uncomfortable talking to their family about death and money. However, talking about your estate plan does not need to focus on either of those things. Telling your family about your estate plan is a chance to talk to your family about values.
It is more important to tell your family why you have done something in your estate plan, than to tell them exactly how much money they will receive. An explanation of the values behind your estate planning decisions should be the focus of the discussion.
An estate planning attorney can advise you in creating an estate plan that meets your unique circumstances and also help avoid future family battles.
Reference: Market Watch (Nov. 18, 2017) "How to talk to your family about your estate plan."