If you have married someone and your spouse has children from a different relationship, those are your step-children. Even if you have helped raise the child from a very young age, unless you have adopted the child, they would not be considered your child for inheritance purposes. The implication of this can be significant. Here’s an example: When Harry met Sally, Sally had a newborn child, Betty. Harry married Sally shortly thereafter. They raised Betty together, but Harry never adopted her. … [Read more...] about Planning for Step-Children