[ His being irked is fair, she has to admit, even if his way of expressing it is rather irksome in itself. ]

I'm fifteen because I was born fifteen years ago - [ She is, at least, nice enough not to overinflect on the fifteen. ] But as for why I'm here, you're more likely to get an answer from our..."hosts."

[ A sigh. Because boy, she's not happy about being here either. ]

I don't think it would be at all a satisfactory one, of course.