I was told, years ago, that it was agreed that none of the family would speak to the media except this one aunt because she "knew how to deal with the media".
On the one occasion that Judith did speak to the media directly (after she drunkenly attacked Corinne in her workplace), Judith was quoted as saying, "It's all rubbish - it never happened." Of course, we will never know if that was what she said, or if the media just made that up, but it's the only time, to my knowledge, Judith was ever quoted directly (any other time it was "sources" who spoke on behalf of the family). And it was a lie, because it most certainly did happen!
I just had a thought (how could I not have thought of this before?) If this aunt knew SIO Dobbie at the time, that might explain the aunts' public appeal that included the information about Jodi borrowing clothes from her sister without asking, at exactly the time the DNA results came back with Kelly's DNA on the t-shirt Jodi was wearing.