Her life will likely go as OTL. Edward need to survive until 1489 for influencing Anne's life. She will be 12 years old at the end of that January and Duchess of Brittany after her father's death the previous September so will be able to legally marry Edward but the wedding will not consumed before another couple of years so you have all the time for Edward dying without heirs and his sisters being married off the England. If Anne is Duchess and widowed and in England she will be able to marry Maximilian and go to him without risking of fall in the hands of the French King.Indeed it did, though if Edward V dies in say 1484, what happens to Anne?