That smirk makes Shinji wary right away. He eyes her reaction cautiously before turning away to pick up a cup. Even if she came in unannounced, he wasn't going to be rude.

What she said next made him fumble with the cup. His ears heated up to their very tips.

"What are you-- that's--" Shinji snaps back without thinking about it, stammers, then recovers. "What makes you think we'd do that?!"