Nazanin Zaghari-Ratcliffe was blocked from seeing daughter Gabriella yesterday and interrogated instead, husband Richard said.
As the couple's hunger strike continues into a tenth day - Richard camped in front of the Iranian Embassy in Knightsbridge, Nazanin in Tehran's Evin prison - he explained in a video diary for advocacy site Change.org that they had had "feedback" from the Iranian authorites.
This had taken the form of an interrogation, he said, where Nazanin was told she would not be released before her sentence was completed in 18 months time.
According to Richard she was also again threatened with a second court case over spying charges - which has been hanging over heard for two years - and Boris Johnson's comments that she was "teaching journalists" were again brought up against her.
This comes after a weekend where supporters of the West Hampstead couple, have joined friends and family to help Richard to demonstrate over Nazanin's continuing imprisonment.
On Saturday, they helped the Ratcliffe family to paint stones in support of Nazanin, while on Sunday afternoon there was a pointed sing-a-long - those outside the embassy sang tunes including Somewhere Over The Rainbow and Queen's Don't Stop Me Know (which of course includes the lyric "I want to break free") on the pavement.
This coincided with a distressed phone call from Nazanin to Richard regarding the interrogation, so she was at least able to hear the support for her in London.
On Saturday, Richard told this newspaper that, while she was fragile, Nazanin was ever
"It has been quite an amazing week, really. It's probably had a few different phases. Right at the beginning I was feeling quite vulnerable, and then they were obviously trying to move us off.
"They calmed down a bit after that, and they were briefing against us in the media.
"So many people who have been following the story have come to meet us. It's been lovely, we've had a number of Iranians - who have been through similar things - come down too, I think we've temporarily made the embassy safe for them...
He explained that "there's clearly stuff going on behind the scenes, we just have to wait and see what that is."
Foreign office minister Dr Andrew Murrison has been Iran this weekend and he said he had discussed Nazanin's case.
He said: "While in Tehran, I also pressed again on behalf of the UK Government for the urgent and unconditional release of Nazanin Zaghari-Ratcliffe and all British-Iranian dual nationals who are being arbitrarily detained."
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