Esteban has a tendency to just use others for his own pleasure without giving much thought to their feelings. It's merely selfish behaviour brought on by living a life only for himself.
On the opposite end, Kadiil lives his life for others; completely selfless, if not incapable of actual physical combat at the present time. He got himself swept in to Esteban's charm and wiles, and when it became clear Esteban was just toying with Kadiil's emotions, Kadi got a little upset.
Frankly, Rockefeller needs a slap in the face to wake up about himself. He can't continue to use others for whatever he wishes and still expect to live a life unfettered with anguish.
While, of course, this is just an outburst of aggression and hurt on Kadi's part, he doesn't injure Esteban.. just leaves him with a lot to think about.
Artistically speaking, I know the desk looks wonky, but whatever. If I wanted to go that extra mile to make it look absolutely perfect, I'd have gone back and done so.
Colored in Painter 7.