Just some ideas

Then Yuri, adoring, sacrificing Yuri, walks in. TwilightLoid ducks instinctively his head down. His pride unwilling to let a part of his newfound family see his weakness. His inability to protect, to defend. Then gloved fingers gently tilt his head up to meet eyes that widen imperceptably.

As Twilight looks at Yuri's face, he's terrified that for a moment Yuri actually believes that Loid deserves this treatment over those charges, those stupid, small charges. Instead Yuri apologizes, but Twilight interrupts saying it's not necessary, expecting another harsh, ruthless interrogation, this time by his little brother, with extra emphasis, telling him he'd rather get this over with.

Instead Yuri presses his head into the crook of LoidTwilight's neck, arms wrapped around his torso. Twilight rests his head on top of Yuri's to offer comfort, he knows that Yuri is his brother first and foremost. Twilight sighs before encouraging Yuri to do his job.

Twilight has never had a younger brother or siblings but he doesn't want Yuri to risk something he values for him (Loid) and he cares about Yuri's future, even at the risk of being found out. He offers Yuri all the comfort an older brother would, instinctively as soon as Yuri looks even the slightest bit affected. He'd want to tug the kid into a hug but his hands were cuffed and he had to pretend. He didn't think he could bare the looks on his family's faces if they found out he was a spy but... in that moment all Twilight wanted to do was give his little brother a hug.

What neither of the knew and found out much later, like after the Trials of Apollo for Sally and after he's got Duke for Bruce? Sally finds out when Bruce reaches out to her. Bruce was going through a box of his parents things when he finds out that he has a younger sister that he was too young to remember. With his resources, he finds out she is alive and living in New York, her name is Sally and she has 2 kids.

Out of respect, he doesn't look into her personal life much. He reaches out by visiting her. Percy was out at that time maybe with Apollo, maybe at school. She tells him she won't introduce him to to her kids until she has 3 different DNA tests from 3 different facilities of her choice who's names she won't share with him that their siblings. She does this for two reasons: she can't risk false hope or giving him an openning to hurt Percy.

DNA testing takes time, yk?

They don't know each other and maybe Dick is there with Damian cause Damian is still a child. Dick goes outside to pick up a call. And the place starts getting robbed and Percy has a saving people thing, right?

So he goes in the takes one of the guys down but then he sees the other guy pointing a gun at Damian and so he tackle Damian, getting shot it the process, but still manages to take the kidnapper down.

Damian is super touched that this random unknown civilian would take a bullet for him by funding his hospital bill at least until they realise that Percy was gone. They check and realise that nobody matching Percy's description was even remotely injured in the way Damian's savior would have been.

On this day, Dick and Damian are coming to pick Tim up from college. They have some brotherly bonding planned (Damian and Tim's relationship has improved drastically now that they're both actively working on it).

Damian recognizes Percy and Dick notices thay Damian's distracted and then tim walks up to them waving bye to Percy and Damian quickly asks who that was? Tim is like my friend? Duh? And Damian is like what's his name and do you have his number? Tim's like None of your business and why?

Then Yuri, adoring, sacrificing Yuri, walks in. TwilightLoid ducks instinctively his head down. His pride unwilling to let a part of his newfound family see his weakness. His inability to protect, to defend. Then gloved fingers gently tilt his head up to meet eyes that widen imperceptably.

As Twilight looks at Yuri's face, he's terrified that for a moment Yuri actually believes that Loid deserves this treatment over those charges, those stupid, small charges. Instead Yuri apologizes, but Twilight interrupts saying it's not necessary, expecting another harsh, ruthless interrogation, this time by his little brother, with extra emphasis, telling him he'd rather get this over with.

Instead Yuri presses his head into the crook of LoidTwilight's neck, arms wrapped around his torso. Twilight rests his head on top of Yuri's to offer comfort, he knows that Yuri is his brother first and foremost. Twilight sighs before encouraging Yuri to do his job.

Twilight has never had a younger brother or siblings but he doesn't want Yuri to risk something he values for him (Loid) and he cares about Yuri's future, even at the risk of being found out. He offers Yuri all the comfort an older brother would, instinctively as soon as Yuri looks even the slightest bit affected. He'd want to tug the kid into a hug but his hands were cuffed and he had to pretend. He didn't think he could bare the looks on his family's faces if they found out he was a spy but... in that moment all Twilight wanted to do was give his little brother a hug.