"Derek. DEREK! Noooo. Stop, stop what are you doing?" Emily kicked her feet out and flailed her arms about trying to get away from him. One agent puts the life of another in danger, but how were they to stop it? Once damage is done, can the one responsible ever forgive themselves? (At end, Demily, but til then, team fic with JJ as the bestie) warning: a bit dark, but a happy ending