She's not giving up easy.
Why's that, we hear you asking?
There is some method to her madness: Mariah Yeater's attorney Jeffrey Leving exclusively tells E! News that they are requesting that the do-over test be conducted with one of Yeater's attorneys present to confirm that the sample is truly that of the 17-year-old.
"We have been negotiating a DNA test," Leving says. "We just received communication from Justin Bieber's lawyer today concerning our discussions, which are private."
But not that private, apparently.
"We are trying to set up a DNA test—to test the mother and the child and to retest Justin Bieber. Because we have to make sure the chain of custody is properly supervised.
"I wasn't aware Justin Bieber was allegedly taking a DNA test until I read about it," he continues.
"I don't know if it was even his DNA. Evidence has to be properly supervised to make sure it is not corrupted. What I am hoping is to get DNA testing done for everybody and to have it done in a supervised setting," Leving adds.
And while the attorney tells E! News he's hoping the matter is resolved out of court, he is fully prepared to take the case back before a judge.
"We are trying to do this outside of court. If it can't be done out of court, then the only other option is to refile."
And how does the Biebs sniff this out?