This started as a drabble inspired by p0cketw0tch's post on Tumblr about Sara flirting with Felicity to tease Oliver and I got so much positive feedback that I decided to make a story of it. The first chapter is the same, but after that it's all new.

Oliver wonders if Felicity would be into it. He knows Sara would be. Not just because he has very distinct memories of her sharing intense make out sessions with other girls during parties pre-island either. No, she's been turning on the charm with Felicity since the beginning.

The first thing Sara said to her was, "you're cute." Sure, Felicity had just gone on one of her awkward rambles and the statement is generally pretty accurate, but even if that moment were an aberration, everything about their interactions since has only solidified it in his mind. Sara is pursuing Felicity.

In fact, she's flirting with her right now. The only question is whether Felicity is aware of it. Oliver looks across the room from the work station where he's fashioning arrows to where the women are literally circling each other on the training mats and wonders how she could possibly miss it. Sara wasn't exactly subtle when she suggested this little sparring session and Felicity hadn't put up much of a fight, figuratively speaking. Literally speaking, she's putting up a rather good fight. They've only just started, but Felicity is doing surprisingly well. Though Oliver suspects Sara's taking it easy on her. He could have easily taken Felicity to the ground by now.

The arrowhead he's attaching to the wooden shaft suddenly slips in his hand and he's just deciding he's got to focus when he comes to understand the game Sara is playing here. Felicity, having grown cocky because of how well she's doing, makes a mistake and gets too close. Sara quickly takes advantage, twisting Felicity's body so her back is pressed to Sara's front. She leans in and whispers something in Felicity's ear and the latter smiles before elbowing Sara in the stomach and squirming out of her grasp. Felicity steps back to the edge of the mat, squaring her stance to ready herself for Sara's next move and smiles mischievously, her bottom lip trapped between her teeth.

Well, that settles it, the flirting must be mutual. Oliver's seen that look before, though this is one of the few times he's seen it directed at anyone but himself. It can be tough to tell what does and doesn't constitute flirting with Felicity. At least half the words out of her mouth are accidentally suggestive, so distinguishing the things she actually means to say isn't always easy. But he has never seen her look at Diggle like that during their training sessions.

Damn Diggle. This wouldn't be happening if he weren't home sick with the flu. Oliver's got to find a way to focus on something other than the frankly delicious sounds Felicity and Sara are making as they spar. He looks down at the pile of arrows he's made and decides his best option is to go over to the grindstone and sharpen them. That will at least drown them out.

Unfortunately, doing so also puts him closer to the training mats. So, he's got a front row seat when Sara finally succeeds in knocking Felicity to the ground, landing on top of her in a way that has nothing to do with self defense. She leans down to playfully snarl in Felicity's face and Felicity responds with a laugh that Oliver thinks might be the most distracting sound of all. But that's nothing compared to the way he feels when Sara helps Felicity off the floor and then looks directly at him, smiling like the cat who ate the canary.

Mother of God. She's doing this on purpose. He had explained to Sara–repeatedly–that Felicity and he were nothing more than coworkers and good friends, but he should have known she was up to something by the sly tone in her voice every time she asked. And this whole performance doesn't change their relationship, of course. Felicity is just his friend and she and Sara can flirt as much as they want, but a man would have to be dead to ignore this. And Oliver feels very much alive right now.

He shakes his head a bit to clear his mind and then commits himself to sharpening arrows with renewed vigor. That is, until he sees Sara slam Felicity to the ground again out of the corner of his eye. The move seems unnecessarily rough and he's just about to protest on his friend's behalf (if only to wipe that smug look off Sara's face) when Felicity surprises them both. With a move he knows for a fact she didn't learn from Diggle, Felicity twists her body and strikes out with her arm so Sara is knocked backwards, falling flat on her back. Before she can move, Felicity pounces and ends up on her knees, straddling Sara's hips and holding down her hands with hers. She looks just as smug as Sara did a moment earlier, but Oliver finds it maddening for an entirely different reason.

Suddenly, he's reminded of what he's supposed to be doing by the ugly sound of the arrowhead slipping on the grindstone. Before he can react, the arrow slips in his loose grip and the bottom edge of the arrowhead catches on the stone, sending the arrow flying across the room where it clatters loudly against a weapon rack. When he looks back to where Felicity still sits atop Sara, he finds the former looking confused and the latter looking downright triumphant.

"You OK over there, Ollie?" Sara asks in mock concern.

"I think I've just been sitting too long," he says and stands, turning off the grindstone as he does. "Think I need a few minutes on the salmon ladder. Get the blood pumping," he adds, annoyed with himself and her. However, that changes a moment later when he catches Felicity's reaction to his decision, smiling and biting her bottom lip the same way she did earlier. Sara notices it too and Oliver can't help but feel smug at the look of jealousy that flits across her face. She turns to look at him then, her expression a mixture of anger and possessiveness that's also clearly a challenge. Oliver smirks back at her and then removes his shirt.

Two can play this game.