The mother-son dance is one of the sweetest traditions you'll see at a wedding. It's also one that just may break your heart.

At his wedding, this groom dances with his mother, who was battling breast cancer. Three days later, the mom, Mary Ann Manning, died. Her final wish was to dance with her son at his wedding.

After finishing the dance, the mother is helped to her wheelchair to sit down.

It's about as awe-inspiring and moving a moment as you will see.