It's just a name.
McGee watched as Abby held their daughter. "Abby, we still haven't decided if she is going to have your last name or mine." McGee said. "Yours, she can have your last name." Abby replied. Just then Tony and Kate came into the room. "Hey, we came to see her." Kate said. "What's her name?" Tony asked. "Addison Camelia McGee." Abby replied. "Hey Kate, you remember when Aidan was that small?" Tony asked. "Yeah, I remember." Kate replied. They stayed and visited for a few minutes but it was late and Tony and Kate needed to pick Aidan up from Sarah's house.
When Tony and Kate got to Sarah's house and Sarah let them in. Aidan was chasing Mikaila around the living room. "Have they been like this all night?" Kate asked. "Aidan, Mikaila slow down. I said no running in the house." Sarah yelled but they didn't listen. "I'll handle this. Aidan Wyatt Dinozzo get over here this instant!" Kate said firmly and Aidan stopped in his tracks and went over to his mother. "Wow, you almost never use his full name." Tony said. "Well that's because he knows that when I say his full name I mean business." Kate replied as she picked Aidan up. Aidan who was now two years old had learned what he could get away with but he also liked to try to push the limits. "You ready to go?" Tony asked. "Yeah, let's go." Kate said.
That night as Tony and Kate put Aidan to bed they couldn't help but smile. They loved him so much. As they left the room Tony stopped Kate and put his arms around her. "So Kate when do we tell Aidan our good news?" Tony asked. "We'll tell him in the morning." Kate replied. Tony and Kate were very happy because they were going to have another baby. They found out a few days before Abby had Addison and with everything going on they hadn't had time to tell anyone, but they decided Aidan would be the first to know.