Jigsaw Theory.She was one half of a two peice puzzle, and she had spent most of her life looking for the other half.
Kate remembered the jigsaw puzzles she used to do as a child. Most of them she'd get for christmas from aunts and uncles she didn't see at any other time of year. She would sit there for hours, looking through the peices and seperating them into the different types; edge peices, peices of people; peices of sky; peices of sea.
As she got older, she started to relate her life to those peices. Together they would make a whole. Sometimes this was a picture of a farm, or mountains, or that really hard one she got for her thirteenth birthday of a place of baked beans, or her favourite one of the unicorns standing in a storm of comets (she liked that one best because it wasn't tied down by reality). But apart, these peices were useless. You couldn't do anything with them, or figure out what they were, or what they were a part of.
Just like her.
If you get the two right pieces in a jigsaw puzzle, the two will fit perfectly together beside each other, but if you get two wrong pieces, you try and force them to fit for a while, just to make sure, but then you pick up another one that looks right, and keep trying until you've got a match, just because you can't live unless the puzzle is complete.
When you find that piece that fits, it is only part of the picture, but you don't realise how much of the picture it is until they've been fitted together. But when something breaks the bond, the pieces fall away, because they're not set with glue, or tape, and so there's always the chance that things will break.
But the shape doesn't change, so all you've got to do is pick the pieces up, and put them back together, even though the cracks between them will always be there. And it reminds you that no matter how perfect they look together, it doesn't take much to break them apart.
Sometimes, love is the missing part of the puzzle, and she realises this as she watches him moving between the people - looking for her.
She is still one half of a two piece puzzle, and after all this time of searching, she's finally found the other person - the one who completes the puzzle, and steps back to show her the final picture in all it's glory.