Olivia knew before either of them did.
It was the arguing that first tipped her off.
They griped about everything, literally. They fought over which one of them should pick the other one up in the morning, they fought over who should get the coffee, they fought over who should do the paperwork, they fought over who was better at anything, running after perps, video games, making coffee, getting women, driving; they argued about everything under the sun. And that told Olivia one thing: they were both head over heels.
Her next suspicion arose when Fin woke up after the operation following the events of the bodega hold up, Munch had pushed past herself and Elliot, into Fin's room where he had stood awkwardly, his hands wringing frantically before he had rushed forewords and growled a warning at his bedridden partner.
"Don't you ever do that to me again."
Fin had blinked at him, shocked, for once, at his partner's actions but before he could retaliate John had turned on his heel and strode out of the hospital room without another word.
The third time Olivia saw something spark between the two she was pretty sure they were beginning to catch on.
It had started off as a completely innocent passing of the milk, Munch held the small, plastic bottle out for Fin to take, but when Fin's fingers brushed Munch's there was a split second of complete stillness in which the two partners stared at each other, their eyes wide and then they both jerked violently dropping the milk, which exploded, splattering Elliot and Huang who were innocently waiting for coffee.
In the following distraction of Elliot griping loudly, Huang scrubbing violently at his shirt and Cragan laughing unhelpfully, Olivia had seen a flicker of bewilderment and embarrassment laced on Munch and Fin's faces, for just a split second, before they hastily joined in Cragan's teasing.
It was in fact almost exactly a year after the milk incident when Olivia had rushed out of the Precinct so fast she had forgotten her scarf, sighing, she had turned around and stormed through the bitter wind and back into the building to retrieve it. It was only as she approached the glass window set into the heavy wooden doors that she realised someone was still there.
Fin and Munch, on Elliot's desk ,kissing.
It didn't surprise her, not at all, although she did wonder if her co-workers were planning to fuck wildly on her partner's desk just because he got them the wrong type of coffee that morning. She turned to leave when she heard an audible squawk from behind her and faced the door again to see Fin and Munch staring at her, expressions identically horrified. She couldn't help it. She had laughed.
The two of them swung into defensive mode and sprung properly apart, Fin wrenching the door open.
"What're you doing back here?" he growled in a totally un-threatening threat.
"I came to get my scarf," she said, pointing simply at the maroon coil of fabric on her desk. Munch had snatched it up and thrust it at her, his face pinker than Olivia had ever seen it. "You know, Elliot would freak if he knew you were being gay on his desk."
They both had stared at her in furious terror.
They had both started spluttering, threats from Fin and sarcastic half-jokes from Munch.
"Hey, guys," she barked over their futile excuses, "I knew before either of you did."
They had both gawked at her, puzzled, then glanced at each other, then back to Olivia. Fin's brow creased in confusion, John's expression equally as perplexed.
Olivia had wrapped her scarf around her neck and had waved perkily at them.
"See you tomorrow, boys."
She had left the building with a grin on her face and two confused men in her wake.
Oh yes, Olivia had known way before they did.
