Based on this prompt from an anon on Tumblr: "Olicity Prompt: Presidential candidate Felicity Smoak falls for her bodyguard and her election campaign manager tries to keep them apart. :)"
I want to make it very clear before we start that Laurel is not a villain in this. That's not my bag. But politics these days is all about image and a single, female presidential candidate having an affair with a bodyguard would be a potential media nightmare for a campaign manager.
Laurel knows what's happening even before Felicity does. She's too good at her job not to. But she's also known her friend long enough to read the signs.
It starts with him. When tall, handsome, Secret Service agent Oliver Queen first appears, he's stoic and focused on the job—a model of detached efficiency. But as she so often does–what Laurel has always considered the source of her power as a politician–Felicity wears him down. She asks him about his life, greets him with that big sunny smile every morning, refuses to forget he's there like she's supposed to and soon, Laurel begins to notice that the way he looks at her doesn't seem so detached anymore.
She digs into his past immediately. The listless, slightly troubled childhood, the exemplary military record, his reputation amongst his colleagues for being a bit of a man about town. That last part gives her comfort (Felicity has never been one for flings), but then she discovers that his philandering stopped sometime after they won Ohio and she's more worried than ever.
She hopes Felicity will be too focused on the prize to notice, but then she realizes that the way Felicity looks at him is starting to change too. There's a softness, a dependency to it that wasn't there before—she looks to him for a nod of encouragement before a big speech or grips his arm a little too tightly as a crowd gets rowdy. Still, she's not quite sure it's romantic until the assassination attempt.
It's chaos in the first few moments after the sound of gunshots shatters the silence in the room and she searches frantically until she sees a flash of familiar blonde near the door before Queen whisks her behind a door to safety. Laurel follows quickly, pushing her way through frightened, confused spectators and ravenous journalists until she follows them through. Oliver takes a threatening step toward her before he realizes who it is and then turns back to Felicity, who's leaning against the wall looking dazed and terrified. Oliver takes her face in his hands and leans down to catch her eye.
"Ms. Smoak," he says softly, his fear barely controlled, "are you hurt?"
"I'm alright, I'm alright," she breathes, voice shaky, and then reaches up a hand to encircle his wrist.
The door bangs open again as a photographer tries to make it into the room and Laurel pushes him back, just able to close the door again as the other bodyguards haul him away.
"Get her out of here!" she shouts and Oliver grabs Felicity's arm, but she doesn't move, her face suddenly determined again.
"Shouldn't I say something?" she asks, "Reassure everyone? Did anybody get hurt?"
"We'll release a statement," Laurel replies, "and I'll find out what I can. But right now you need to get out of here."
"She's right," Oliver agrees. "It's not safe," he says firmly and then drags Felicity away despite her protests.
From there, it's a whirlwind of press releases and phone calls and meetings and by the time Laurel gets back to the hotel, she's exhausted. She goes to Felicity's room to brief her on the information they've learned about the shooter and talk about their next step. She uses the key Felicity gave her like she always does and then stops dead in the foyer when she finds Oliver is in the room. He and Felicity are standing not far from each other, faces flushed and breathing hard, and Laurel notices that Felicity's lipstick is smudged on his lips.
"I need a word in private with Miss Smoak," she says, trying to hold in her anger.
"Sure," Oliver replies, reaching up to run his hand over his mouth before he turns to look back at Felicity a moment. "I'll be right outside," he says softly and Felicity gives him a look that Laurel knows means she has a big problem on her hands. She watches Oliver go, giving him a cold look and then turns back to Felicity once the door shuts.
"So what did you—" Felicity starts before Laurel cuts her off.
"We'll get to that in a minute," Laurel says. "Right now, we need to talk about you and him."