Stella Moris said there are now real fears for the health of the founder of WikiLeaks.
Assange has been detained in Belmarsh prison in London since he was dragged out of the embassy a year ago, and is awaiting an extradition hearing on behalf of the United States, where he is wanted for questioning over WikiLeaks activities.
He has been in poor health for months, but his friends say that the coronavirus is now spreading in Belmarsh.
One prisoner died and several prison guards are ill, suspected of having the virus, his friends said.
In a court statement in support of a bail request, Moris reveals that she met Assange in 2011 as a legal researcher, and that she was asked to investigate the theory and Swedish legal practice.
“Over time, Julian and I have developed a strong intellectual and emotional bond. He became my best friend and I became his, ”she wrote.
The friendship developed and, despite the “extraordinary circumstances”, a close relationship started in 2015, she said.
The couple have two young children: Gabriel, three and Max, one.
She said that she had made great efforts to protect the children from the climate around Assange.
Moris added: “My close relationship with Julian has been the opposite of how he is perceived – of reserve, of respect for each other and trying to protect each other from the nightmares that have surrounded our lives together . “
She said she was making the statement now because their lives were “on the brink” and she feared Assange would die.
He is isolated for 23 hours a day and all visits have stopped, she added.
Extradition hearing scheduled for May 18 after Westminster trial judge dismissed appeals to adjourn until September for “insurmountable” hardship prepared by his legal team due to Covid-19 pandemic.