Anything easy has its cost.

Everyone else was under the impression that Lily had fallen in love with James gradually, but the truth is this: she married him because he wanted to give her everything. She loved him because he had tried so hard to.

They were both taught that being a Black meant blood and fire, but eventually it meant ashes.

Luna Lovegood married Draco Malfoy because of three little events that made her believe him when he said he loved her. She divorced him for one.

And when all's said and done, what protection does the bonds of paper afford? For Andromeda Tonks, nothing compared to the bonds of blood.