Whether by being sanctified in the womb the Blessed Virgin was preserved from all actual sin?

Objections

Objection 1 : It would seem that by being sanctified in the womb the Blessed Virgin was not preserved from all actual sin. For, as we have already stated (Article [3]), after her first sanctification the fomes remained in the Virgin. Now the motion of the fomes, even if it precede the act of the reason, is a venial sin, albeit extremely slight, as Augustine says in his work De Trinitate [*Cf. Sent. ii, D, 24]. Therefore there was some venial sin in the Blessed Virgin.
Objection 2 : Further, Augustine (Qq. Nov. et Vet. Test. lxxiii on Lk. 2:35: "Thy own soul a sword shall pierce") says that the Blessed Virgin "was troubled with wondering doubt at the death of our Lord." But doubt in matters of faith is a sin. Therefore the Blessed Virgin was not preserved from all actual sin.
Objection 3 : Further, Chrysostom (Hom. xlv in Matth.) expounding the text: "Behold thy mother and thy brethren stand without, seeking thee," says: "It is clear that they did this from mere vain glory." Again, on Jn. 2:3: "They have no wine," the same Chrysostom says that "she wished to do them a favor, and raise herself in their esteem, by means of her Son: and perchance she succumbed to human frailty, just as did His brethren when they said: 'Manifest Thyself to the world.'" And a little further on he says: "For as yet she did not believe in Him as she ought." Now it is quite clear that all this was sinful. Therefore the Blessed Virgin was not preserved from all sin.