I think Tavie is right about Ember's decision. It was about giving Mender a chance to carry Tier away. Otherwise, the two of them would have had to fight off a whole bunch of men- because Tier was dazed and couldn't run. She was acting as a decoy. As far as Windkin's comment is concerned- I also think that it probably means Tier is his son... if just because the next panel cuts immediately to Tier climbing the cliff. That's pretty straight forward. I actually like this idea of Windkin and Kahvi hooking up. It feels natural. He would have been the closest she could have gotten to having a cub with Tyldak. And it would have been a reason for him to leave her- if he felt awkward about it. Since he couldn't have taken Tyldak's place in her heart. And that would also explain why he is so interested in them now. Maybe he simply gave her a child and took off.