User blog comment:SayuriDarling/Full first chapter of The Mark of Athena/@comment-98.154.47.185-20120602222913/@comment-5112532-20120603143418

I think that the Wikia contributor who replied, has a good theory. Since she was fiercely against Paris and the city of Troy, and therefore Aeneas, who was the fore-father of Rome, for not choosing her as the fairest of them all.

Maybe Athena/Minerva, as her Roman self, didn't have any children because she was a maiden goddess, and the Romans did not realize Annabeth and her siblings were not born from the divine thought of Athena and the moral ingenuity of the man she's in love with...

Although I don't think Athena could have a big personal vendetta against Rome because she was widely respected by the Romans as the goddess of war and wisdom.