(This takes place 2 months after Justice League vs Teen Titans. And Nathan is older by 2 minutes and they're both 13. This is my first fanfic so I hope you like it.)

Nathan was pacing back and forth waiting for his mother to finish his catsuit. He had been waiting for this moment since he started training, he was nervous and excited. He was nervous because he didn't want to see his brother, he knew he had a brother. He remembers that the people who kidnapped him told him that they would let Damian live if he eliminated his grandfather and his biological mother.

"Nathan, your suit is ready." Selina said as she stepped aside letting her son see his suit. Nathan smiled and went to put it on.

After he put the suit on he looked in the mirror. Selina knew her son wouldn't want anything fancy, so she made the suit similar to hers but with a few adjustments. She made it with a hood with cat ears, added a black leather jacket, and added a black mouth-mask, also put black boots. And put a belt to hold his whip and put 3 smoke bombs and some gadgets, and she also added two gloves with claws on them. Nathan smiled and said "I love it."

"That was easier than I thought." Nathan said grabbing the last of the jewels. "Trust me son, either Batman or the Teen Titans will be here soon." Selina said as she quickly tied the bag. "Now let's get out of here before we get caught." "Too late." Said a female voice. Nathan and Selina both turned around and saw the Teen Titans and Nightwing. "Who are you?" Robin said to Nathan in a demanding tone. Nathan felt his blood go cold. Catwoman knew her son was scared so she spoke. "If you must know Baby Bird, this is my adopted son Catboy." She placed her hand on her son's shoulder, giving it a gentle squeeze, reassuring him that everything was going to be ok.

"Look we can do this the easy way or the hard way. Which ever you prefer." Nightwing said as he got his weapons. "Catboy now!!" Catwoman shout. Catboy quickly grabbed one of the smoke bombs and threw it at the Titans.

Once the smoke was clear both Catwoman and Catboy were nowhere in sight, but there were two windows opened. "Robin, Blue Beetle, and Beast Boy catch Catboy. The rest of us will catch Catwoman. Titans Go!!"

Catboy ran as fast as he could away from the jewelry store. He remembered his mother telling him that if they get separated by the heroes is to lead them to the warehouses by the docks. Once he got there he hid the bag of jewels, waiting for the Titans to arrive. He grabbed his whip stood in the middle of the warehouse. Not even a few minutes later he heard someone landed behind him. "This is your last chance to give us the jewels." Robin said with his sword ready. Catboy turned around and saw Blue Beetle hands both were morphed into blades and Beast Boy had turned into a tiger. Catboy grabbed his dart-gun and shot Beast Boy, he was out like a light. "Beast Boy!!" Blue Beetle shouted as he started firing at Catboy. Catboy quickly dodged the blasts and threw a small gadget that looked like a small spider except it was robotic. Once it was on Blue Beetle it electrocuted him knocking him out instantly. Robin quickly kicked Catboy from behind and grabbed Catboy's jacket and threw him to some old wood crates.

Catboy quickly grabbed his whip, and ran to Robin. He tried to hit Robin with it but Robin got out of way and swung his sword at Catboy. Catboy wasn't fast enough as Robins sword made a cut on his arm. Catboy yelled in pain as he grabbed his arm, Robin took this as an opportunity and punch's Catboy in the face. Catboy landed on his back as Robin put a foot on Catboy's chest and amid his sword at Catboy's neck. "Show me who you are, right NOW!!!" Robin said.

Little did he know that Catwoman was behind him with a dart-gun. Robin was about to take Catboy's mask off when Catwoman shot him on the back of his neck. Robin quickly took the dart out but it was too late as the drug was taking effect. Catwoman took the chance to kick Robin off of her son.

Catboy grabbed the bag and ran with his mother back home. On the way back Catwoman had one thought in mind. 'I hope they don't find out who my son is, I can't lose him.'

"Are you sure you're okay." Selina asked her son as she examined his arm. "Mom I've told you this a thousand times, the people who kidnapped me inject something in me that gave me the ability to heal my wounds. The scar will fade in a few minutes." Nathan said as he opened the bag of jewels. The Titans got Selina's bag before she got away. "And I've told you this a thousand times that I'm your mother, I'm going to worry about my baby kitten." Selina said as she ruffled her son's hair.

Nathan blushed in embarrassment. He hates but secretly likes like it when she calls him that.

"Mom!! You know I hate it when you call me that T-T" "Don't care, no matter how old you get you will always be my baby kitten." Selina hugged Nathan and started kissing Nathan's small face. "Eek mom quit it!!" Nathan and Selina laugh as Nathan got out of Selina's grip and ran as Selina chased him.

Selina tackled Nathan as they both ended up on the couch. Both of them sat, still laughing, Selina smiled at her son. It's always made her happy to see him smile, it's her greatest treasure.

'Who is that guy?' Damian thought. Him, Beast Boy and Blue Beetle. Had woken up 3 hours after the fight, right now Damian was staring out the window. He was angry that Catboy had beaten him, and on there first fight! 'I swear I will find out his identity, even if it's the last thing I do.'

(Hope you guys liked the first chapter of this fanfic. Again this is my first fanfic so I apologize if I made a mistake. It might be a bit before the next chapter is posted but I'll try to get it out soon.)