Lo'ak would mate you at an early age, way too early. Like, at 12. But you two don't regret it.
No one but Neytiri and Mo'at would know that you're mates until he rushed in their tent looking for something and you're there doing Tuk's hair.
"Baby, have you seen my rope?"
"It's not my job to keep up with your hunting gear, Lo."
"Baby girl, please. Just tell me where it is."
"It's in my satchel. You left it the other day."
He rummages through your bag and sighs in relief when he finds it. He runs over to her and kisses her head gently in thanks.
"Thanks, sweetheart,"
"Mhm,"
Then he runs out when Neteyam threatens to leave him behind.
"All done, Tuk,"
"Thank you!"
It was quiet and you look up to see everyone blinking at you, Neytiri smiling fondly. Even though she was shocked at their actions at first, she knew that you two were happy and that you would never regret it. And that, seeing her child lovesick and happy, was enough for her.
It was also a plus that you were basically perfect in her eyes.
"What?"
"What was that!?"
She shrugged at Jake's question, smiling, and walks out humming.
They'll cross the "telling Dad and getting yelled at" bridge when they come to it.