Full disclosure here, this is really bad but I kinda like it so be honest on how you feel about it.

Damian was in the foulest of moods. In his hand he was almost ripping a stress ball in half due to frustration. Unfortunately, Dick didn't know about his foul mood. Bruce had tasked him with talking to Damian about missing some classes which couldn't be excused as him being Robin. "Damian we need to talk," Dick announced, walking into Damian's room. 

"I don't want to talk," he snapped. 

"This is serious. Bruce tells me that you've been skipping classes." Damian rolled his eyes then turned to face Dick. "I skip the classes because I don't want to be there. It's boring." 

"You can't just skip classes because you feel like it. You need an education," the older insisted. "I get that class is really boring compared to being a hero but you need the knowledge to progress in your personal life."

Already done with this conversation, Damian ripped the stress ball in half. "Grayson, you're not even real family so get out," he barked. Dick stared at him in confusion. 

"What do you mean? Of course I'm real family."

"No you aren't. You aren't Father's real son. You are just a popularity booster that became more problematic with time. If you hadn't found out about Father's life as Batman, you would've been dumped off at some orphanage like the burden you are." Damian explained in a deadly serious tone. Dick choked up. "Just go to class," he said, his voice weak. Damian waved him off without a care. He was right. He was always right. Dick went straight past Bruce who had heard it all and walked out of the front door as quickly as he could without raising suspicion. Bruce scowled to himself, knowing exactly what had caused the reaction. He didn't care if Damian was his son or not, no one upsets Dick like that and gets away with it.

Bruce slammed Damian's door open, his face showing he was ready to shout. "Damian, you had no right to talk to Dick that way!"

"Father, he is a circus child you adopted years ago. I am your son. I have the right to speak to him that way," he protested. Bruce had to hold back every muscle in his body to not scream at this boy. "He may as well be my son. Not once have I ever thought of taking him to an orphanage." Bruce told him sternly. "But-"

"There are not buts when it comes to family Damian. You're grounded. Stay in your room and think about how disrespectful you have been," he interrupted, slamming the door shut. Damian stared at the door for a second. He was shocked by the reaction he got out of Bruce. It was the most he'd ever really gotten. He glanced at the pieces of paper on his desk and looked for a pen.

After grounding Damian, Bruce went out to find Dick. He luckily hadn't gone that far. He'd just gotten to end of the garden. "I'm surprised you didn't leave," Bruce said. Dick turned to him with a sad smile, roughly wiping tears from his cheeks. "You left the gates electrocuted," Dick reminded him. The older sighed and pulled Dick into a hug. "I'm not that bad am I?" Dick asked, holding onto Bruce. "Not at all. Damian is just." He didn't know how to finish the sentence. 

"He's unique let's say," Dick suggested. They laughed a little. 

"You need to get to bed, I can do patrol tonight," Bruce said.

"You sure?" 

"Positive."

That night, Dick slept like a log. Crying always did help him to sleep quicker. In the morning, he sat up and stretched. He then noticed a piece of paper labelled "Grayson" on it. "Please don't be a list of all my faults," Dick mumbled, recognizing the handwriting as Damian's. He carefully opened it and all that was there was "I regret my strong words towards you last night. You are a valuable asset." Dick laughed to himself. "Not bad Damian. Not bad."