What if:

Takes place during Chuck vs. Lethal Weapon

Chuck just told Ellie that he isn't moving and walks into his room. He grabs his Tron poster, but just before he can turn it around and lay it on his bed he hears "you know, you don't have to get rid of that poster"

He turns his head and sees Sarah smiling and standing by his bed. He sees that the Morgan Door is open and places the poster back to the wall.

"So I see you put the Morgan door to good use" Chuck says amusingly

"Yea well, being a spy you need to find out all the best ways to sneak up on someone" Sarah responds

About two minutes ago he basically confessed that he loved her and now she was in his room acting as if nothing happened. Sarah sat on his bed made a glance at Chuck and then to the bed in an offer for him to sit next to her. He doesn't refuse and sits about a foot away from her.

"You know Chuck, I was thinking about what you said before and…" Sarah was then interrupted by Chuck

"Sarah, I don't want to…"

"Chuck can I talk for once?"

He sees her persistence and remains quiet.

"Chuck, I was just talking with Cole earlier and he made me realize a few things. He made me realize that I can't keep denying myself. I need to take care of myself and finally admit things to myself." Sarah took a breath in and let it out. "Chuck, I wanted to tell you that this is more than a cover relationship for me. I want to be with you." She looked directly into his eyes and saw a smile form onto his face. She couldn't help but make a smile of her own.

"Sarah, are you saying that you want to start a real relationship?"

"In a way. It's going to be hard. We are going to have to have boundaries for missions and we can't let General Beckman know. Casey is fine with it as long as we don't let our emotions get involved in missions and that he doesn't see us…well…you know"

He takes her hands in his and at some point during the conversation had inched all the way to her side of the bed so that they were right next to each other.

"Sarah, I'll do whatever it takes to be with you."

Sarah takes her hand and runs it through his hair and kisses him. Chuck wraps his arms around her waist and brings her closer to him. Their kiss deepens. It's a kiss filled with passion and need and love. Sarah breaks off the kiss for air and then says "Chuck, lock the door and I'll pull down the blinds."