She is simply confused by terms.
The Pope is the Vicar of Christ in that he “stand in the place of” Christ, but this is not the same as “being” Christ.
Peter’s Role as Vicar of Christ Church Proved from Scripture
In John 21:15-19, the resurrected Christ, commands Simon Peter three times to “feed my lambs” and “tend my sheep.”
15When they had finished eating, Jesus said to Simon Peter, “Simon son of John, do you truly love me more than these?” “Yes, Lord,” he said, “you know that I love you.” Jesus said, “Feed (bosko)* my* lambs.” 16Again Jesus said, “Simon son of John, do you truly love me?” He answered, “Yes, Lord, you know that I love you.” Jesus said, “Take care of (poimanao) my sheep.” 17 The third time he said to him, “Simon son of John, do you love me?” Peter was hurt because Jesus asked him the third time, “Do you love me?” He said, “Lord, you know all things; you know that I love you.” Jesus said, "Feed (bosko)my sheep.
In this passage, we can see that Jesus leaves Peter in charge of feeding, tending and caring for His sheep. Who feeds, tends and cares for sheep? A shepherd!
Unfortunately, many non-Catholics object to the Catholic understanding that Peter was given this unique leadership position, and they cite a passage from earlier in this same Gospel wherein Jesus presents Himself as the Good Shepherd, and says there is to be but “one flock and one Shepherd.” (John 10:11-16) Therefore, the immediate question springs to mind: If Christ is the Good Shepherd, why can’t He “feed” and “tend” His own sheep?
Of course, Jesus is God, and He is clearly capable of taking care of His own flock – even after He ascends to heaven. So, why does He appoint Peter to this role? Obviously, all sheep belong to Christ, and they do not cease to belong to Jesus after the ascension. Yet, Peter is told to “feed” and “tend” them. Jesus commissions Peter to act as His “stand-in” or “vicar” after the ascension. Jesus will remain the one Shepherd, yet Peter will “feed” and “tend” the sheep, in the sense that Jesus will not be physically present to do it. Thus, Peter will be the visible, vicarious shepherd of the flock.