Ino, Shikamaru and Choji are practically family due to their parents constantly raising them around each other; traditionally, it was to keep the ino-shika-cho formation passed onto the next generation, but personally ? it was because they were all family. moving to the next generation, ino made sure the tradition was kept alive ( shikamaru and choji did as well ) and when Temari and Shikamaru got married, Ino not only welcomed Temari, but also Gaara, Kankuro and Baki into the family ( @shieldedsand , @gengakki , @karukv , @bakisensei) ,---- the same thing happened with Choji and Karui; ( TDLR; INO BASICALLY WELCOMED EVERYONE 100/100 WAY BEFORE ANYONE GOT MARRIED )they all became intertwined in each others lives; when cho cho, inojin ( @ishenbi) and shikadai were born, they all spent time at each respective house, forming a bond with one another close to siblings and became the next generation’s ino-shika-cho.