Well I’m not the only one to have “observed” its(hail) usage in that way...
Mary acknowledged “the God of her salvation”. The work of Salvation was Christ’s alone via the finished work of the cross. Mary was co-redemptrix of nothing. She carried Christ in her womb, then had other babies with Joseph...for Joseph “knew her not” until after the birth of Christ.
“Mary was co-redemptrix of nothing.
She carried Christ in her womb.”
And that, is the Catholic position in a nutshell. She is co-redemptrix for she bore Christ.
Did she not care for her son from infancy? He is both Son of God, and Son of Man.
Co- means share not equal. The Church defines it Co- with, together Not equal.