Ok, for those who were just as confused as I was with the end of the last chapter, I think I've figured it out. My take on it is that, yes, she was looking at the reader as if to say, "she's mine, go find your own," and the whole thing was just a 4th-wall joke of her being jealous and not wanting anyone else (us) to see her lover naked. Which is great, because I don't like dealing with "suddenly yandere" in any story.