That is Because She Knew Things That were Supposed to be Kept Secret.
She now knows that you work on your computer until very late at night because you have work-related responsibilities. Your excuse to your wife for being too busy at work is invalid. Nope. She did not find out you liked cartoons until late at night, which was a total surprise.

It looks like parts of the document that aren’t appropriate for all readers have been hidden in the margins. It makes me curious to know where she got her knowledge; more specifically, where did she learn it? She put the new mirror she had just bought on the wall across from where you do your work, just like this is how it works. One of them, in particular, stood out as someone who looked like they were having trouble.