Ever the House Husband

Episode Tag - 2x03: "The Weigh Station." Halstead, after discovering he has a bounty on his head, decides to go undercover with JP, a 'retired' hit-man, to catch a man named Shostak. After the op, Jay and Erin decide that they don't want to go through life without each other, and smut ensues. M for lemons. Centered around the Linstead pairing, with all the other usual pairings.