I wondered if Harry letting the magic fly was a good idea, and now it's obvious that it wasn't. I hadn't expected Narcissa to figure it out though, but in hindsight it makes total sense.

I did notice that Draco thought of Harry once--I wonder if he's subconsciously connecting the dots. Harry doesn't seem to realize that the more he acts like Brian, the more suspicious Draco is becoming. It seems that things will be coming to a head sooner than I thought, unless Harry can come up with some way to put Narcissa off. This will totally ruin Draco's plans otherwise.

I laughed out loud several times in this chapter. And such a cliffhanger! I can't wait to see what happens next!