DH has two kids from a previous marriage and we have one together. We are finally sorting out our wills and finding the asset split tricky. Did you take into account what your stepchildren wild inherit from their mother/family and try to make it even? As it stands now if both of us died 80% of our assets would go to our son as he's three and would be left with friends to raise. Once reached the end of formal education whatever was left would be split between the three kids. Does that seem fair?