Andy pretends to be getting his bitchy beauty rest, but immediately bounces down the stairs and gets Shane ("Fuck am I gonna do with a dollar?") to go spy on them. Their conversation is Nancy playing dumb and laying out every scenario so that he'll eliminate them one by one: this is another fake/secret engagement? No. This is a secret babydaddy arrangement? No. He tells her about his date with the woman he's "supposed to be with," so Nancy obliges and tells him to fuck off, heading for the door, even though that's clearly not the whole deal because he's proposing. He explains that she had the right clothes and said the right things: she was the perfect wife for a candidate. "She turned you down, so you're here?"
Just waiting for the shoe to drop, because if she can't think of the awful thing then the awful thing will fuck her, so she's spinning out every scenario she can think of, and he's like, "No, duh. I'm here because I love you, and you love me, and we have an awesome kid." And then comes the scenario she didn't think of, which is a random guy walks out on the sidewalk in front of her house and starts firing a gun. Esteban shoves her down onto the lawn, and Cesar plugs the guy like a million times, and everybody's okay. Except for Shane, who's sliding down the wall onto the porch.
So what are the options here? The shooter was meant for Esteban or Nancy; or on the outside I guess her family. That means it's either coming from Pilar, to protect him, or from Pilar to eliminate him, but neither of those are legit. If it's some random Mexican drug lord thing that's dumb, because all it does is teach Nancy that she's swimming with sharks, and that's like the one thing in all of reality that she acknowledges. So the bullet was meant for Nancy, who has no enemies but one, a radical and scary confrontation with whom she's been building since, oh... Season Three?