Prompt: If Matt can tell what Foggy had for lunch two days ago, then it's pretty much impossible for Foggy & Karen to hook up w/out Matt knowing, right?

Optional:
- Matt jerking himself off, thinking about it (bonus points for guilt)
- Foggy realizing Matt knows & doing things to deliberately drive him crazy
- 1000 gold stars for both of the above leading to an ot3

Link: http://daredevilkink.dreamwidth.org/725.html?thread=58581#cmt58581