To me, that is a reasonable request....what about those people who request to see someone famous...to me, this is something that those closest to her got to participate in and will remember upon her death! It really showed the commitment level of her boyfriend - I think it is great!
If I was dying, I know that this would be my wish! Getting married is one of those big milestones in life in addition to having children and watching them grow up (which she'll never have or get to see). What should she do as her last wish? Go to Disney world?! lol
I also love how her boyfriend is staying by her side even though it must be tough for him to know she'll die and watch her decline. I wonder how long they've been together.