Euri lets out a little squeak, one that's muffled by the kiss. Wait, shit, this isn't right - she's on her back and he's the one on top, he's the one in control and he's kissing her and dear god she's shivering as her mind plays catch-up.

... Damnit! She was doing so well! At least, she thinks she was... Robin probably was just teasing her. Euri would be thoroughly annoyed if she wasn't busy responding to the kiss, squirming under his touch. Whatever semblance of control she thought she had is going out the window when his fingers finally stop.

"R - Robin...!" She tries to sound angry, but her tone is far from it, more of a mixture between nervousness and surprise. To make it even worse, she's reflexively pressing her legs together, as if she's being overcome with modesty. Mostly she's just flustered at Robin's comment, and the look he's giving her.