Under the Belgian inheritance rules, the default rule is that all your assets go to your children, in equal shares.

If you are married, and you do not make a Will, your spouse will have a usufruit on your estate. If you are in a registered or civil partnership, your partner gets a usufruit on the family home and on the furniture in the family home. Partners who do not register their partnership do not inherit.

If you do not have any children, your spouse inherits everything, but if your parents are still alive they are entitled a reserved share of your estate.