A Letter For Niall

Clèo got her worst gift she ever received for her fourteen birthday, she get lung cancer, stage four. Lèxy, her sister try to do everything to make Clèo happy before she gone forever from the world and she find a wish list from Clèo closet and she promise to herself to make it came true. Clèo have a letter for Niall Horan, she will give it to him when she meet him face to face, with Lèxy help and Lèxy running her fangirl twitter account she think it will help her a lot. She has to give the letter no matter how to give it to him, because Lèxy future is depends on that letter.

Did Clèo finally gave the letter to Niall?
Why Lèxy future is depends on that letter?
Will Lèxy keep her promises to make the wish list that Clèo made came true?
Will Niall received the letter and responed to it?