User blog comment:Omega natsu2/Chapter 371: Tartarus Arc, Part 2: Song Of The Heavenly Dragon, Predictions./@comment-5193626-20140209011818/@comment-1595565-20140209223055

That means Jude was able to impregnate a dragon. To quote from an appropriately fitting abridged series, "The partisan love between man and beast is not something I can abide by." Also, you would think that Jude and Lucy would notice her displaying some more dragon-like behaviors for that to be true.