Prompt: in honor of the Densi bday can you write an AU version of how they could have hooked up in that episode and then discovering the other identity?

So, I didn't follow the prompt exactly, but close enough. I also don't consider this AU, as I would like to think this could have happened. :)

Kensi wasn't sure exactly how she ended up in her current position, with her suspect's teeth latched on to her earlobe. Well, his teeth weren't really the problem. Her real problem was his cock straining through his flimsy gym shorts and her too thin leggings, hitting her just right as he was grinding her up against a wall of the MMA gym.

"So you never answered my question," Jason Wyler, or whoever he was, breathed into her ear.

It was a question Kensi didn't have a good answer to; the reason she was at the gym so late at night was to look for more evidence connecting Janklow, Wyler, and the rest of the crew at the gym to Daniel Zuna's well-covered up murder. But she couldn't exactly tell him that. "Maybe I was looking for you."

Tugging at her tank top, he guided his surprisingly gentle teeth down her neck and collarbone. "Hmmm. I don't believe that." Everything about him was setting all of her senses on fire, and it had been way too long since a man had done that to her.

"Well it's true," Kensi gasped as his hand crept into her shirt. She really shouldn't be doing this. "I didn't trust you. Thought you were lying to me." She wants to run her hands through his wet, blond hair but stops herself.

"Yeah? I thought the same thing about you."

His beard is tickling her chest and neck, and she's always hated facial hair but for some reason his is really soft and she wonders what it would feel like squeezed between her thighs. No! Kensi's brain tried to scream. She needs to focus and get the hell out of this gym. "Really? Do you make a habit of trying to fuck girls you don't trust?"

Pulling his mouth away from her chest, he flattened his palms on either side of her against the wall. She missed the feeling of him and instinctively thrust her hips against him again, forcing herself from shoving her hand down his pants and stroking the life out of him. A flash of something different, maybe one of his many other personalities crossed his face for just a second when he looked at her. "Almost exclusively," he answered with a small smile.

Kensi bit her lip and looked deep into his blue eyes. God, she loved blue eyes. She needed to get out of there, fast, before she got too deep into this or he got too deep into her. He's a bad guy, she told herself. Even if he smells way too good to be a bad guy and probably tastes even better than he smells. Swallowing deeply, she placed her hands on his chest. "I should go."

Jason, or whoever he was, pushed away from the wall willingly. Kensi thought she saw a mixture of disappointment and relief wash across his face. He pursed his lips and blew a large puff of air out of his mouth. "Okay. Maybe I'll see you again, Terri."

Kensi faked a smile. "Tracey."

"Right," he responded with a real smile.

Kensi realized she was still pressed up against the wall, and she really wished he was still grinding against her. Naked, preferably. She straightened her shirt and raised her chin with pride. "Hopefully I never see you again, Justin."

He narrowed his eyes. "Jason."

"Right," she said with a smirk, before sashaying out of the gym. That wasn't a lie. She really hoped she'd never see him again.