Here is a new article about Avatar 2. James Cameron talks about Jake and Neytiri's family. It mentions their daughter who will be eight years old in the film. Her name is Tuktirey played by Trinity Bliss. According to James, she watches her parents get into a big argument while hiding under a big structure and peeking in on them. This is a marital dispute that is very critical to the storyline. I like that this will show Jake and Neytiri's relationship is far from perfect. It makes the whole thing very realistic. Like humans, Na'vi have spats with each other. They don't always get along. Jake and Neytiri are no exception. If they were shown as being in a perfect relationship with no arguments or disagreements, it would be very unrealistic. No relationship is perfect. Every one will have its ups and downs.
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