I love you too Spence... (One shot)

Peyton Evans was a 16 year old victim of a serial killer many years ago that young Reid saved. All of her family had been murdered so she moved in with Reid. He adopted her and 5 years on she follows in her foster fathers footsteps (even though she considered him a friend) and trains to become an FBI agent. She finds herself wanting to work with all her friends at the BAU and gets a spot. Now two years later she's developed feelings for her gaurdian and co-worker and is boil to tell him, right after we arrest this Unsub...