I think she'll be fine. Lewis's literary Aslan had a bit more of an edge to him. After all, he is not a tame lion.
Lewis acknowledge that his return to Christianity was heavily inspired by GK Chesterton's Everlasting Man. In that book, Chesterton takes issue with modern Christianity's depictions of Christ as being too soft. Chesterton points out that the Biblical Christ did have an edge and called us all to meet some pretty rigorous standards of behavior.
There is one way in which the movie did dilute the book's Christianity - to the best of my recollection there is no mention of Aslan being the son of the Emperor-over-the-Sea, no mention of the Emperor at all.
There isn't a lot in the book - Mr. Beaver so names Aslan when explaining him to the children, and Aslan says, "Work against the Emperor's magic?" in such a way that no one ever suggests such a thing again. In the movie I think he says "Work against the Deep Magic?"
An extremely significant omission.
Mrs VS