The latin teaching of annullment is quite problematic. An annulled couple makes their offspring illegitimate bastards and a product of fornication.
With respect, buzuxi. It would be better if you were certain of your "facts" before you run off misrepresenting the practices and teachings of the Catholic Church. Your short statement above is riddled with inaccuracies.
#1 - It is not a "teaching of annullment [sic]." The Church recognizes that there can be a defect in the process of conferring a Sacrament. Which means that the Sacrament is invalid. A Declaration of Nullity does nothing to affect the sacramental status of a marriage, it undoes, renders asunder, nullifies or dissolves nothing.
#2 - The process of granting a Declaration of Nullity (that is the proper and correct term) is a long process in which the circumstances of the marriage at the time of the marriage
is carefully examined to be certain that both parties were able to confect a valid sacrament with no impediment. If a valid and legal (under Canon Law) impediment to a valid sacramental marriage is found then the tribunal can issue a Declaration of Nullity. Which is nothing more (and nothing less) than a statement that there existed at the time of the marriage, an impediment to a valid sacrament.
#3 - The "legitimacy" of the children is not a matter of Canon Law but a matter of civil law. Therefore, a Declaration of Nullity does not render the children of the marriage "illegitimate." That is a statement used by many in ignorance or malice.
#4 - All marriages are presumed to be legal, licit and valid by the Catholic Church. Unless, in the course of a petition for a Declaration of Nullity, it is found that a sufficient impediment existed. Since all parties assume the marriage to be valid, even after the Declaration of Nullity is granted the sexual relations are not viewed as "fornication" and thus a sin. Why? Because everyone was acting in good faith that the marriage was valid, licit and legal.
Your single short sentence shows both a glaring lack of understanding of the Catholic Church's teaching and practices as regard marriage and an apparent hostility exemplified by your willingness to issue such damning statements with little understanding and even less proof. It is insulting to Catholics and intellectually dishonest.