You had lived with dean since you were a little baby, when his father had saved you. Since then, you grew up as their little girl. You'd stayed by them wherever they went, and fortunately for them, they'd never had the heartbreak of you leaving, like Sam when he went to college. You followed them around on cases, and were kind of the balance between the two boys.

Now, you were living in an abandoned apartment after a particularly hard case, where you were currently watching tv while they were doing the hard paperwork. Adult stuff that you, fortunately, didn't have to worry about. Mamma mia played in the background quietly, and you sung all of the songs as they came on, from the heart. "Slipping through my fingers" came on soon, and you sung, "funny little girl- slipping through my fingers all the time I try to capture every minute- the feeling in it-" His back was tense.

He'd never admit it, but when he heard it, the tough facade always fell, and he always got upset, remembering when you were little.