Klay and Kalel were at the office, listening to the conversation, feeling happy. They knew that Atlas was aware of the fact that they had someone keeping him safe from the shadows.
They knew how much Ludek and Kaiser meant to Atlas, so the fact that he basically asked for their blessing, meant he liked them as much as they liked him.
Kalel felt so happy that he was almost vibrating. When Atlas kept refusing to meet under the guise of being busy, he thought that Atlas was staying away because he was still angry at him.
But when Atlas caressed his cheek earlier, his heart turned into a puddle, and he felt a crazy amount of love for him.
Kalel felt Atlas' tenderness for him and saw that he had it for Klay too when he was in his embrace. It would have killed him if they were to lose Atlas because of him.
Klay looked at his brother's happy face, knowing that he had been worried that Atlas was avoiding them because of him. But he knew that Atlas was just teasing him.
