I don't know if the writer's wanted her to be an idiot, or if they thought her action was rational. In Granite State, she unlocks her hinges and steps onto her front deck after hearing that Jesse is sitting in the shadows of a very dark car.
"Jesse? In that car way over there? Where? I don't see him?"
How about asking some intelligent questions like
"Why is he sitting in a car. Why did he send you hear and not come up himself. Could he at least roll down the window and wave? The car's lights aren't even on."
Or even the "Okay, so what exactly do you want? What brings you here? Why didn't yall come over here at a less of an ungodly hour?"
My subconscious asks these questions automatically. Of her background, and Tomas dying on her you'd think she'd be even more weary than I am. She lives in a much more dangerous neighborhood than I and a much more devastative history. If i were writing the show Andrea would still be alive. That is the only problem I had with the episode.
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However, this is also all Jesse's fault. If Jesse said "Kill Andrea or Brock and I don't cook." instead of "Go ahead and kill me, I'm never cooking again." Andrea would still be alive. Jesse keeps screwing everything up. Remember it was his grand plan in the first place that got Hank and Gomie killed and got himself captured. He could've been in Alaska by now. But then again, if Jesse didn't screw up there would be an absence of 5 episodes of Br Ba.