I much prefer the misunderstandings and unknowns between the two... like I feel this is a relationship of misunderstanding and until they understand that they both often misunderstand each other... I don't know... There is so much the MC is wondering about, but doesn't voice. Are they starting a relationship or not?
Six is not human. He is a lycanthrope. CH 12, the question isn't can Six kill for Marlon, it should be is Marlon alpha enough for Six? Honestly, I see Six as a protector type which means Beta or Gamma. Although Six loves and is sexually attracted to Marlon, I see the protecting aspect come out more. Up till now, Six probably viewed the two he ran away with as his pack, but he wants to choose Marlon. So *shrug*... We saw his older wolf form. Unless a bullet hits his brain, the wolf can take a few bullets before dying. If he can get properly trained, better yet maybe he could even dodge a couple.