For whatever reason, Frank and Foggy start hooking up. Maybe they meet because of Daredevil, maybe Frank is following him to find out who DD is and they end up in a bar ... doesn't matter. They're fucking and they're both super into it.
What matters is Foggy now has a secret to keep from Matt and ... he likes it. He's not *lying* about it (just like Matt wasn't lying about being the Devil of Hell's Kitchen, amirite?), but he makes a point to shower and change his clothes before seeing Matt, and doesn't talk about Frank.
Matt can tell Foggy's fucking someone--he can always tell when Foggy was fucking someone, especially because Foggy never bothered to try to hide it, but now he IS. But if Matt pushes or tries to use his senses to figure out what's going on, he'll break the fragile truce between him and Foggy. So he angsts and stews and maybe he hits criminals a little harder than he would normally while Foggy is getting his brains sucked out of his dick by Frank. (Possibly while the latter is still bloody from kicking the shit out of some criminals. Foggy *might* have a type, but he'd never admit it to Matt.)
I would prefer it not end up Foggy/Matt, and no Foggy blatantly using Frank as a Matt stand-in. Pining is A-OK though. And Matt!guilt. SO. MUCH. GUILT.
Frank/Foggy + Matt being guilty/angsty
What matters is Foggy now has a secret to keep from Matt and ... he likes it. He's not *lying* about it (just like Matt wasn't lying about being the Devil of Hell's Kitchen, amirite?), but he makes a point to shower and change his clothes before seeing Matt, and doesn't talk about Frank.
Matt can tell Foggy's fucking someone--he can always tell when Foggy was fucking someone, especially because Foggy never bothered to try to hide it, but now he IS. But if Matt pushes or tries to use his senses to figure out what's going on, he'll break the fragile truce between him and Foggy. So he angsts and stews and maybe he hits criminals a little harder than he would normally while Foggy is getting his brains sucked out of his dick by Frank. (Possibly while the latter is still bloody from kicking the shit out of some criminals. Foggy *might* have a type, but he'd never admit it to Matt.)
I would prefer it not end up Foggy/Matt, and no Foggy blatantly using Frank as a Matt stand-in. Pining is A-OK though. And Matt!guilt. SO. MUCH. GUILT.