Since Mary is the Immaculate Conception itself

In Lourdes, the Immaculate Virgin answered Bernadette, who was asking who she was: "I am the Immaculate Conception.” By these luminous words, she expressed not only that she was immaculately conceived but in a deeper sense, that she was the Immaculate Conception itself. Something white is not the same as whiteness itself; something perfect is not the same as perfection itself. ...

The Holy Spirit is the Uncreated Immaculate Conception... Admittedly, the third person of the Trinity is not incarnate, yet our human word of "spouse" cannot express the reality of the relationship of the Immaculate with the Holy Spirit. We could say in a sense that the Immaculate is "the incarnation of the Holy Spirit."

Saint Maximilian Kolbe