Well it was a concern! Even if she hadn't thought about it at all until Shinji said something! Like, what if her hands were sweaty? How terrible! She just kept making his day worse and worse!

The bandaging effort is temporarily forgotten, her hands frozen over his as she grapples with these horrifying thoughts, until his clarification makes them clench in surprise. Ah jeez, she just crumpled up a bandaid. The process of dropping it to the side and picking up a new one puts enough of a pause on all her frantic thoughts to leave her in a quieter sort of confusion.

"O-oh. I just--thought you really hated this kind of thing, so...." Actually, did he ever say anything as extreme as that? She can't remember now.