How could your church possibly leave the kids out of it when Mommy and Daddy weren’t really married in the first place? What does this say to a child?
Pray tell how this is actually EXPLAINED to the children of a marriage that the church pretends never existed?
In granting a declaration of nullity, the Church is saying there was no sacramentally-valid marriage, not that there was no natural or civil marriage. Children born of a civil marriage are not illegitimate, even if the marriage is not sacramentally-valid.
Otherwise, the Church's teaching could only be construed as saying that all children born to non-Christian couples are illegitimate, as non-Christian couples who marry are obviously not married according to the sacraments instituted by Jesus Christ.