Title: Calculations
Fandom: Numb3rs/Torchwood
Rating: NC-17
Pairing: Jack Harkness / Charlie Eppes / Susan Berry
Summary: Charlie's first consulting job.
Warnings/Spoilers: Het, slash, threesome, crossover.
All Thanks To: tigerbright for the title, lomedet for boundless encouragement, jelsemium for numb3rs_xovers, and dsudis for beta reading this, for which I am utterly grateful.
Author's Note: Susan Berry was Charlie's girlfriend during his time at Cambridge University; she appeared in Ep. 2.18, All's Fair.
Disclaimer: None of these characters or their settings belong to me.

( The prettiest girl he's ever met sleeps in his arms while the handsomest man he's ever had sex with hums in the shower. )