Meh, all they are doing is giving themselves something to lose. Stupid if you ask me.

Mack said that the fraternization rule only applies to assets in the field, which FitzSimmons are not.

Fair point and I'm not saying she is an agent necessarily. Just that Mack was making it sound more about the "in the field" part than whether she's considered an asset or agent.
Though I'm not sure if SHIELD agents are necessarily exempt from the Accords - if they were then wouldn't Cap just join SHIELD again so he can go where he wants?
Oversimplification I know .
Reading my signature constitutes admission that I am correct. (Too late)

If she were an agent then they wouldn't need to reference the accords, an agent wouldn't need to be reminded of them to play ball because as an agent they would be duty bound to work in SHIELDS best interest regardless whether they are normal or enhanced.

She could be both.
The issue was the "in the field" part, not so much asset/agent.
I imagine they don't want shot callers getting attached to assets/agents in the field that might need to be asked to get in harm's way.
Reading my signature constitutes admission that I am correct. (Too late)

I thought she was, but apparently she isn't. I guess she just works with them instead of for them.

Ok I missed that part of the conversation, so Yo-Yo isn't an agent?

Mack, an "agent" cannot fraternize with Yo-Yo, an "asset in the field" - Fitz and Simmons are both agents - so yeah, there's a difference.
RIP 616
#TimeForMoreAmadore