Under the Will if you leave the residue of your estate to your children in equal shares, then your step-children will not be provided for. This is because step children do not come into the definition of children for the purposes of
making a Will. If you have step children you can select the option "to pay the residue to children/benficiaries in different shares". This allows you to then give named individuals shares of your estate to prevent step children being left out.