The movement of Adora's head creates a pleasant drag against Catra's lips, the brush of their tongues inciting that spark again; and when Adora pushes into her mouth, Catra doesn't stop her, curious as well.

It is weird, really weird, to feel something against her teeth, but Catra allows it, just curling her tongue to press along the side of Adora's. Then she sweeps across the roof of Catra's mouth, and it's such an unexpected burst of sensation that Catra's breath hitches with a sharp gasp and she recoils, breaking away abruptly with parted lips and wide eyes, her ears back in surprise.