Title: Letters to Mom. Characters: Dr. Spencer Reid/Derek Morgan. Rating: PG, for some kissing and a bit of language. Summary: "All day long, Reid’s been playing with something, and it’s driving Derek absolutely up the wall." Word Count: 805 Prompt(s): "congratulations" from my 20_fics tables. Disclaimer: Reid and Morgan belong to Jeff Davis and CBS, which is to say: not me. A/N: General spoilers through all of season two.