Monsters don't sleep. He had a nest because he likes to think he's sleeping, and resting. Now that his body is changing, he's feeling sleepy. Something he hadn't felt for a long time.
When he less imagined he fell asleep sitting on the corner, and he woke up startled when Atlas woke up whining and Wayde went to take him to the sandbox.
Then he saw the most beautiful thing he ever saw in his life: Astri breastfeeding Atlas.
He already had a son and watched him grow, but the feeling was completely different. Now he has the feeling that he would enjoy watching her pregnant of him, and carrying his cub.
Once Atlas was done and went back to sleep, Astri looked at Kangki sitting in the corner and got confused.
"Are you all right?" She asks him.
"Yes."
"You look like you were sleeping."
"Yes… I was." He smiles, happy to know that she pays attention to him.
"Oh.. Then use the bed."