Context: Back when Jocelyn was part of Aperture Labs, she and Wheatley were looking after the test subjects in the Relaxation Chamber but when Wheatley accidentally hits the frame of the door while he was on the management rail....he leaves a dent on his head which leads to Jocelyn rushing to his aid....when she found something to fix the dent....he starts reflecting how she would do something similar for him countless times before even after they were built

"Hehehehe....heh....do you want to know something Jocelyn?"

"This almost reminds you of our first days of being created, doesn't it?"

"What do you mean Wheatley?"

"You know when we were first built almost several years ago and how we would be training all the time?"

"I would always try to keep up with you."

"You were a little oblivious in some ways."

"Like, I would fall behind or have trouble testing out the hacking abilities you have."

"But when I try to do things I couldn't, I either hurt myself or blow one of my circuits."

"I would sometimes fall from my management rail or crack my glasses or get a dent or bump and I would just start calling for help loudly."

*Chuckles* 

"You would rush over as quick as you could."

"You would try really hard to fix whatever damage I have."

"It was almost like you blamed yourself and you would be afraid of getting in trouble with the bloody employees or the other cores....or even GlaDOS if they found out. Even though it really wasn't your fault, you know?"

"Did I seriously do those things?"

"Of course! Don't you remember?"

"Come to think of it....I kind of do remember."

"I guess I was too focused on my work I didn't really pay much attention to you."

"So in a way, it kinda was my fault."

"Almost like this time too."

"If I wasn't rushing you to get to work on checking one of the test subjects, you probably wouldn't have gotten that dent in your head."

*He places a hand on her* 

"Hey....I'm not sure if you realize it, but....you're always thinking about others. Even after all these years."

"You always rush to my aid while I'm just being clumsy."

"Almost like what a mother would do."

"Wh-? Pffft, Wheatley!"

"I don't necessarily do those things all the time."

"I guess when it comes to you, it seems natural."

"Before I know it, I'm treating you like this."

"I guess that's what happens when my older sister instincts kick in and I've known you for so long."

"Really?"

"Hehehehehe....I guess you're right."

"Heh....I'm glad nothing's changed around here...."

"Do you think it'll be this way forever sis?"

"Forever?"

If I'm telling the truth, there's no telling where we'll end up if we're recognized by the company....it wouldn't be fair to make any promises to him but....

"W-well....I hope so. It's been this long already, right?"

"I can't imagine you changing so....my hopes are up."

"And I don't know what I'd do without a silly core like you for a brother."

*She playfully punches him in the arm making him laugh before pulling her into a hug* 

"Hehehehehe....hehehehe....heh....that makes me happy sis...."

*She returns the hug before Wheatley looks at the clock* 

"I guess we should head back."

"Wouldn't want to worry the other cores."

"Good luck with that brother....they're going to see the dent either way."

"N-not if I hide it!"

*He gets up a little too fast making him light-headed* 

"Woah! Woah! Don't get up so fast after hurting yourself!"

*His responses was only painful groaning as he uses Jocelyn for support* 

"Well, guess it's too late now."

"Anyway, let's go."

*They both head out with Wheatley leaning on to Jocelyn and has her by the arm*