kindle fire is perfect for what she is gonna do with, its not feature heavy and its very easy for her to pick up and use
now for your own personal use get off that which one is better stuff, especially here because you will get the bullshyt of stanning and not real answers
At this point in the game the high end android tablets go neck and neck with the ipad so its about whats best for you and from my experience its best to go with the side you are more experienced with regardless if its android or apple. If you have an iphone I recommend you get an ipad because the syncing of apps, files, etc will be a better experience. Same thing applies if your more familiar with android.