All dependant children have a legal right to be financially supported by their parents.
Child support is a method by which one parent seeks financial support from the other parent when the parents are not living together. Child support determinations are focused on the needs of the child and not on the needs of the parent. You do not have to have been married to the other parent to seek child support. They have been your common law or same-sex partner. However, the person you are seeking support from must have acted in the place of a parent.