pretend to be a paralegal and answer the question (assume your supervising attorney has approved your response).

Client question: "I have two children from my first marriage and have recently remarried a man who has three children of his own. When I pass away, I am looking to leave my children and my children only, my inheritance from my wealthy great grandmother, totaling $10 million. If my spouse outlives me and I die first, how can I ensure that my children will receive the inheritance rather than being split between my kids and him (my spouse) and his children?"