We recently moved to a new home and sent our kids to a new school. The first school mass I did not attend, although my wife was there. She said that at one point in the mass the priest blessed half the congregation with holy water while a woman blessed the other half with holy water. Is this liturgically appropriate? I always thought that if there is a priest present that he should be the one doing the blessing?
I have no idea what you are trying to describe.
You say “priest allowing woman to bless at Mass”. The act of imparting a blessing (or for one not in Holy Order invoking a blessing) is a specific act, involving spoken words – so the image you evoke in my mind as a priest is frankly nonsensical as well as imponderable.
Are you saying that the congregation came forward, individually, with half the congregation receiving a blessing from the priest and half receiving a blessing from another person? A lay person could do this in the same way that a lay person may be associated with the Presider in the Blessing of Throats on the Feast of Saint Blase. The lay minister would recite the formula of the blessing without, however, making the sign of the cross over the person, in the manner a cleric would.
Or are you saying that the priest imparted a blessing to half the congregation and then the other person invoked a blessing upon those on the other side of the church?
The Rite of Sprinkling with Holy Water has nothing to do with blessing people…it is sprinkling them with Holy Water, which is its own distinct thing…but that does not occur “at one point in the Mass”…it occurs at the very start of the Mass, right after the greeting, and in place of the penitential rite.
Since you say it was the first Mass of a new school year, I can only wonder from your description if the Rite for the Blessing of Student and Teachers was incorporated into the Mass in accord with 522ff of the Book of Blessings. The Book of Blessings does not suppose a sprinkling rite in this circumstance however (since there is a sprinkling rite proper to the Mass itself.)
The Book of Blessings, however, allows a breadth of latitude and pastoral adaptation, including the use of assisting minister(s). If what happened was, in fact, the rite from the Book of Blessings, with an adaptation, I could see the Presider having the principal or a teacher take the role of the assisting minister and then have her join in sprinkling holy water since the guidelines of the Book of Blessings would be dispositive for those events, not the GIRM.
Or was this something that occurred as an addendum…a sort of para-liturgy after the Mass had concluded? Norms in that instance are even much more flexible.