Should I contest my late father's Will?
Question Details: My late father's Will states in the event my mother predeceases him, which she did, he gives, devises and bequeaths all of his estate to his beloved daughters then names the 4 of us. One of the daughters named is a stepdaughter. She only lived in my father's/our home for 6 years from age 12 to age 18. Adoption was never discussed and she never went by my father's name. As a married adult she contacted her absentee biological father and formed a relationship with him and his 2 sons and their mother. She was named as an heir in his will, but not in her step-mother's will. I am certain the attorney preparing my mother and father's wills was not aware that one daughter was a step-daughter. Their Wills are identical with the exception of the change of names and relationships where appropriate (i.e., beloved wife to beloved husband, Jean to Donald, she to he, etc.). Since the attorney was not aware of the situation, she did not have the opportunity to explain to my father that his will did not have to be identical to my mother's and that he had options. My mother's mindset was always we have four daughters or 4 girls. They went to have their will made and did not realized it would actually be 2 separate documents - 1 in each of their names. My father never realized that his Will could have been different from my mother's by leaving his estate to his 3 biological daughters. Since my stepsister is listed by name as a daughter, is there any grounds to contest the Will?
No, there is no ground to constest the will on this basis. Your stepsister was named specifically to inherit: since she is named by name, she will inherit under the will, because she is not merely a member of a named class or group where you could challenge whether she is part of that class or group. When someone is named by name, they will inherit, since there is no doubt as to who they are.
That she was named "daughter" doesn't change anything, since your father could have considered his stepdaughter as a daughter, particularly since his wife considered all four girls the same. Furthermore, whether or not the lawyer knew that she was a stepdaughter, your father clearly did: he could have asked the lawyer if he had to leave the same amount or indeed anything to her. However, he did not, which reinforces his intention to treat her the same.