Original Commentary
Yes, Sinclair and Emily are still kind-of going out. And Lemon Technology is kind-of having a Christmas party. I get the feeling that Patrick threw it together at the last minute so he could get out of some other obligation - Terrence

Modern Commentary
Emily and Sinclair haven't shown up together in-comic since just after the wedding. I'm not sure if they're going out, but offscreen or if Sinclair is just showing up at her apartment seven months later as if nothing had happened. - Terrence