For those of us who understand that Aslan is Jesus, then a rejection of Aslan is a rejection of Jesus -- which is why in this discussion we often assume that Susan rejected the entire Christ-life when she rejected Aslan and Narnia. Lewis doesn't address her relationship with Aslan in this world, but as we know he intended Aslan to be Jesus in Narnia, it seems a safe assumption that Susan's rejection of Him is complete in both worlds. You can't really say to the Savior, "I love you in Africa and hate you in the USA."