There is no legal obligation by the Maker to show his or her Last Will and Testament to anyone during the life of the Maker of the Will. But after death, the process has some requirements.
In a Last Will and Testament or Similar Legal Documents, Must I Designate Bloodline Children Differently from a Step Child?
For clarity purposes, when listing blood-related children and step-children within a Last Will and Testament, Living Will or Living Trust, it is suggested that all children be specifically listed in the document by name and then referred to as “my children”. No designation past that is required.