Its on Netflix it's called heart of Christmas. The acting is not great but I overlooked it due to the story. It was good. It was based on the true story of a little boy dying of leukemia around Christmas. They read excerpts from his mothers blog that she kept.
Anyway. I bawled. Then I went and stayed up all night reading her blog. I bawled again.
As she says :
Cherish every moment.