A/N: I wrote this after Summit, but before Endgame... So here you go :)
Disclaimer: I don't own Young Justice, DC comics, or any of their characters.
Jaime smiled as he watched Bart examine himself in the mirror. The speedster hadn't spotted him yet, and was checking himself out in his new official Kid Flash uniform. He twisted his body and craned his neck, checking his reflection from every possible angle. He adjusted his gloves, re-fastened his bootstraps, tightened his goggles, but nothing seemed to quite satisfy him.
Jaime stepped forward. "You look great, hermano."
Bart's gaze shot up, blushing when he saw Jaime. "Oh, uh, thanks, Blue."
He turned away and fiddled with the snack compartment's screws. Jaime walked up to him. Bart looked different in Wally's retired costume. Older, taller, his once scrawny frame filled out with lean, firm muscle. His bright, childish face was now shaping into one of a young man, and suddenly Jaime was hit with a pang of regret. While he had been under the Reach's control, Jaime hardly had time to notice the subtle changes in Bart's appearance, but this new suit made every one of them glaringly obvious. It made Jaime feel like he'd missed out on something, something important. He rested his chin atop Bart's auburn head.
"What's the matter?" Jaime asked, quirking his eyebrows at Bart's frown. "I thought this is what you wanted."
"What I wanted?" Bart repeated in disbelief, looking up to meet Jaime's gaze in the mirror. "Try everything I've always dreamed about. Being by the Flash's side, having Wally's approval, being part of... of a real family... In the future- Or well, what used to be the future- None of that was possible. And now... Having this on... Really becoming a part of the Hero Legacy... I dunno..."
He trailed off and Jaime prodded him, "What don't you know?"
Bart shrugged helplessly, extending his arms and scanning his body. "Is it... I dunno... Is it me, Blue?"
Jaime's smile broadened into a grin, and he wrapped his arms around the speedster, burying his face in his sweet-smelling hair.
"'Course it is, Bart," he murmured. "It's always been you."