I don't own Naruto or Itachi, sadly.
4th One Shot-Jealously
"Ah, Uchiha-sama," said Izumi to Mikoto. "Is Itachi-san here?" She was trying her best to be polite.
"He's training in the back with Shisui," said Mikoto. "Are you his other teammate?"
"Yes, Uchiha-sama and they were supposed to meet me at the training grounds," said Izumi, trying to contain her annoyance with the Uchiha. She bowed politely and then jumped on the roof of the Uchiha house. She landed in the back yard.
"Oh, Izumi," said Shisui. "Sorry."
"Che, I expected something like this from you, Shisui, but not from Itachi," said Izumi, sitting down watching the two Uchiha spar. Itachi looked apologetically at his female teammate.
"Um, who are you," asked a small voice.
"Izumi and you are," she asked.
"Sasuke," said the mini-Uchiha. "My Nii-san is cool, ain't he? Are you his girlfriend?"
"Nah, teammate," said Izumi. "So you're Itachi's little brother? You're a cutie." She ruffled Sasuke hair. The six year old attempted to scowl. Itachi and Shisui stopped sparing. Itachi watched as the girl he loved and the most important person to him talked. He was jealous, he knew. But of who? Who did he love more?
Years later, Itachi knew his answer. Sasuke was the most important to him and Itachi loved him more than anything or anyone in the world.