Jay was right, and the boy attacking just proved it. Maele watched Jay roll out from behind their rock and toss a dagger, the boy focusing on her as he drew another arrow, and she saw her chance. She had gotten them into this with her reluctance to kill, so she had a responsibility to end it. 
While the boy aimed at Jay, Maele dashed out from the other side of the rock, ready to strike with the axe. She was on him in seconds, and buried the weapon deep into his chest, killing him, but not before he let out a blood-curdling scream.