Whether legal relationship is contracted only between the adopting father and the adopted child?

❌ Objection 1 : It would seem that a relationship of this kind is contracted only between the adopting father and the adopted child. For it would seem that it ought above all to be contracted between the adopting father and the natural mother of the adopted, as happens in spiritual relationship. Yet there is no legal relationship between them. Therefore it is not contracted between any other persons besides the adopter and adopted.

❌ Objection 2 : Further, the relationship that impedes marriage is a perpetual impediment. But there is not a perpetual impediment between the adopted son and the naturally begotten daughter of the adopted; because when the adoption terminates at the death of the adopter, or when the adopted comes of age, the latter can marry her. Therefore he was not related to her in such a way as to prevent him from marrying her.

❌ Objection 3 : Further, spiritual relationship passes to no person incapable of being a god-parent; wherefore it does not pass to one who is not baptized. Now a woman cannot adopt, as stated above (Article [1], ad 2). Therefore legal relationship does not pass from husband to wife.

❌ Objection 4 : Further, spiritual relationship is stronger than legal. But spiritual relationship does not pass to a grandchild. Neither, therefore, does legal relationship.