You mentioned a website that you reverted through.
Does it happen to be any of these:
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http://www.islamreligion.com/articles/204/ - It also offers a Live Chat facility
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http://muslimsin.com/
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http://www.convertstoislam.com/
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http://muslimconverts.com/
You can maybe invite her to your accomodation, and convert through one of these websites. Also, you could show the various scientific proofs of Islam on those sites, in order to strenghten her faith. Remember to tell her, than in order to formally and officially revert to Islam, then you must say the following in Arabic three times, with sincerity and convinction, remembering the meaning of what you're saying in English, so it doesn't appear like any ritual:
"Ash-hadu an la ilaha ill Allah." - I bear witness that there is no God but Allah
""Wa ash-hadu ana Muhammad ar-rasullallah." - And I bear witness that Muhammad is his His Last Messenger
If it helps, copy and paste the quotations above on a word document, to remember it fully, before telling her to recite it.