Exactly what? Also I don't get how she is calling someone dumb by "spoiling" the Illiad. Wouldn't it be the opposite of calling someone dumb, isn't she assuming you have some basic knowledge of the Illiad? Would she be calling someone dumb if she referenced Moby Dick by saying that someone's obsession will lead to their down fall like it did for Captain Ahab?

Also, I don't think the Illiad can really be "spoiled". The whole thing was written with the understanding that the audience already knows all the events and the outcome. It would be similar to say someone is spoiling a story about the Titanic by saying the boat sinks. Or someone referring to the story of Job when talking about a series of tragedies that befalls a character.

Edit: an additional thought. If you do intend on reading the Illiad then she actually did you a favor. Like I said the Illiad is written assuming everyone knows the outcome. This makes the Trojans and Hector an even more tragic series of figures as you know they are doomed. Homer uses this knowledge of the reader to make a better story.