Jean's still smirking with all his teeth on display, even as he's cruel, pressing his fingers further over Eren's tongue until his knuckles are bumping his teeth. Either Eren gags around the fingers or swallows around them. He doesn't dislodge the wrist; he doesn't move his foot, either.

"Sorry, what was that? Didn't catch it."

He punctuates that by starting to draw his fingers back, then pushing them back in without giving Eren a chance to talk. Like he's fucking Eren open with his fingers, though his mouth hardly needs the treatment.

His thumb isn't in his mouth, so he uses it to swipe over Eren's bottom lip, just because he likes the look of doing so.