With Marco placed properly on his lap, Reiner allows his hands to roam, sliding one further up along his thigh until he can shamelessly squeeze his ass. He is, and always has been, an ass man. Bertolt in particular must recognize this particular move; god knows he has been subject to Reiner's hands wandering over his ass more time than anyone can count.

With one hand firmly grasping the buttocks, Reiner lets his other hand skim up Marco's back until he can rest it against the back of his neck, cupping his calloused palm and fingers around the highest knobs of his spine, pulling him a bit deeper into the kiss.