She needs to have some measure of control over this situation or she's going to throw someone out a window, and since it won't be herself it would be Gyre. So her choice is to throw Gyre out a window or take control of the situation.

"Ugh, it's fine, just don't let Eight hear it. He'll change it to his dumb music." She answers, looking Gyre over.

"I hope Seven doesn't like Eight's dumb music better."