In this episode(1609) there is a scene with Jack and Gibbs in Vance's office, I just thought it was really sweet and a tiny bit flirtatious. it gave me this idea. I love the friendship between Leon and Jack too and their history. Enjoy.

Jack is about to leave her office. She's got her coat on and is about to grab her purse when it knocks on the door. "come in." she says, and she closes her computer.

"hey, Jack." Leon greets.

"Hey, Leon." Jack greets. "welcome back."

"thank you. I heard it all worked out." Leon says.

"Yeah, it sure did," Jack says happily to report the news to her director while she is walking around her office, grabbing a few things and sorting out the files on her desk. When Leon doesn't leave after having received the good news Jack looks over at him with a questioned look. "anything else, Leon?"

"Just wanted to see how you were doing," Leon says and receives a bewildered look from his friend.

"I'm good." She says a little hesitant, not sure to the nature of his question.

"Are you checking up on me, Leon?" she asks with a smile and grabs her purse.

"let's walk and talk," Leon says as Jack locks up her office door.

"sure." Jack says and stuffs her keys in her pocket. "what is up Leon?" she asks as they start walking towards the stairs.

"I was just wondering how you were doing. How things are going with the team? You seem to be working very effectively with the team." He says. as he is talking, he is looking over at her to see if he can detect any reaction from her to what he is saying. She suddenly stops walking and he stops and looks at her. she leans against the orange wall behind her and looks at him with squinted eyes and her arms crossed over her chest.

"I have been working here in DC under your command for over a year now Leon. You knew already that I work well with the team. What is this really about?" she asks. he signs in defeat. She saw right through his friend chat and called him out. He leans against the opposite wall.

"I notice yesterday how you and Gibbs seem to be pretty close…" Leon says and receives an irritated look on Jack's face. "which is great. I'm happy for you."

"stop it, Leon." Jack interrupts and pushes herself off the wall and starts walking. It makes Leon chuckle as he continues to walk with her.

"he is my colleague. Yeah sure we work well together, and that is it."

"I just detected some chemistry between the two of you yesterday. I know how you feel when your colleagues don't recognize your field as a valuable investigative tool. I was expecting a different reaction from you yesterday when Gibbs asked you to do your profile-thing."

it makes Jack smile. She knows there was a pretty obvious flirtatious thing going on between them yesterday, but she has no intention of confirming Leon's suspicion of something flirtations is going on between her and Gibbs.

"Leon…" Jack says in a serious tone and stops as they are reaching the top of the staircase leading down to the bullpen. "you…" she says and points a finger at his chest. "see what you want to see." It makes Leon chuckle and then Jack starts walking down the staircase.

"I'm happy for you that you got a friend, Jack."

"stop trying to set me up Leon," Jack calls back after him as she leaves the office and heads to the elevator. Leon just chuckles amused and starts heading to his car.

As Jack is standing waiting for the elevator, Gibbs comes up to her.

"hey." He says. She looks over at him. he has a cup of coffee in his hands which is nothing unusual. The elevator door opens, and they step in and Gibbs presses the button. Gibbs notices Jack has a small smile on her face.

"Everything okay, Jack?" he asks.

"it is just Leon."

"Leon?" Gibbs asks surprised.

"yes Leon… you know our director." Jack says in an exaggerated tone to explain to Gibbs who she is talking about even though she is fully aware that Gibbs is just messing with her and the fact that she casually uses the director's first name.

"oh right. Director Vance." Gibs says pretending like he just realized who she was talking about. "I forgot he is a personal friend of yours," Gibbs says almost sounding jealous.

"come on Gibbs," Jack says and they both start laughing.

"he has been trying to get me to meet new people since I moved to DC. He is concerned about my social life." Jack explains.

"is that a bad thing?" Gibbs asks almost concerned and takes a sip of his coffee. Jack looks over at him and sees the concern in his eyes.

"no, it isn't," she says with a reassuring smile. " a bit irritating when he starts to imagine friendships and relationships that aren't there," Jack says and then internally curse her self for saying the word relationship, but Gibbs doesn't seem to react to it.

"he is looking out for you. He cares about you, Jack." Gibbs says casually and Jack nods. She knows that Leon is just being a good friend to her. She looks over at him and recognizes the sweet smile on his face. it is the same sweet smile as he had yesterday. Then the elevator doors open and the ground floor. "a lot of people here do." Gibbs says and then he leaves the elevator.