It could count as payback or just as a spur of the moment, but right now they were in the same comfortable space they were before, the meeting getting them together now so far away.
Levi is just on his lap, napping as he revises documents. A chat evolved into a more lax situation and then Levi decides to take his lap as his new pillow. Strangely the mood around them was cutting them in half, there's something boiling under Erwin's skin he can't quite tone down and what resides in Levi's eyes just warms his blood even more.
When he pulls the Captain into sitting on his legs he doesn't receive any protest, more anticipation than anything else.
Erwin's lips attach to the neck instead of the other's mouth, causing Levi to flinch and then melt in his hold. His hands are heavy, both at his sides while only his mouth traces the neck now on display. Levi throws his head to the side, letting his crook and part of his shoulder free, so Erwin drags his lips, his tongue and teeth over the flesh, sucking and kissing everything on his path.
The way Levi squirms is delightful, he holds Erwin's shoulders while he bites his lip, murmuring 'more' and 'please, bite' and Erwin can't help but comply.
If he keeps with such sounds he won't be hold guilty of what may happen.