The reporter Alley Einstein -- who set up the original deal with the British tabloid The Sun -- signed a sworn declaration, obtained by TMZ, in which she claims the emails TMZ posted this morning were "doctored" to make it look like Einstein coached Upton and told her to lie.
Einstein claims the emails detailing the Botox story -- including quotations -- were intended to be used as a "media briefing sheet" to help Upton REMEMBER several key points ... it was NOT a script.
Einstein claims her reputation is now ruined -- insisting she's been "emotionally and professionally scarred" by the entire situation ... in fact, Einstein claims she even had to seek out medical attention.
As for the $1,000 Einstein wired Upton -- Einstein claims Upton demanded the money for "vital bills" ... but then splurged on a shopping spree instead.
Best part -- back when she was working the story, Einstein claims she asked Upton if she was "prepared to be the most hated woman in America" ... and Upton replied, "Hell yes, bring it on."
We just interviewed Alley on TMZ Live, and she claims she has pictures that she'll give us that prove Sheena injected her daughter, and she's lying.