It's an exercise in - well, not restraint, because Eren can take pretty much anything Jean can throw at him. It's an exercise in not letting Eren get under his skin. He knows that Eren is letting him do this. He's not egotistical enough to think that if Eren didn't want to be here, he could be intimidated enough by Jean to stay.

Sweet stuff, though, that's not how they are. It'll always be violence to hide worry. (He doesn't think he's imagining it that Eren looks most alive and like himself when he's bleeding and panting).

He feeds Eren his cock, still half-hard, but he knows he'll thicken and fill out in his mouth. He's always hot, wet, and Jean would be lying if he said he didn't think about this pretty often. He rocks his hips a little bit as he grabs Eren's other raised hand, mirroring the hold so he's holding up both of Eren's arms.

He tugs, just a little, to watch bone and muscle flex, heat and the movement of his hips getting him fully hard in Eren's mouth.