Why does my kitten do this? ?

I recently got my male kitten at 6 weeks old he was a hand attacker. then i got his brother at 9 weeks. They are really close now they have stopped all the fighting. But since cat number 2 has come along the cat I got a 6 weeks doesnt attack my hands he just keeps making a chirping noise along with purring whenever I stroke him and rubs his cheeks on me all the time, he also kneads me before lying down then licking me as he is falling asleep. Is he doing this to say she is mine or is it affection? Or am I gonna get sprayed on Any minute lol thanks