"Glass?" He arches an eyebrow, admittedly confused. "Well, maybe that's why it's there. So people don't get hurt. Especially if it serves no purpose, there's no point having it elsewhere around the ship."

It is a little strange, though. And she's right. If it's just glass, why not just say so? Keeping that a secret makes it sound suspicious, even if there's no reason for it to be.