Princess Latifa Al Maktoum has spoken about a controversial lunch in Dubai with Mary Robinson where she said that they only discussed a limited number of subjects.
In 2018, Princess Latifa escaped Dubai with the help of her friend, a Finnish capoeira instructor, Tiina Jauhiainen.
Al Hussein accused Al Maktoum of kidnapping his daughters from a previous marriage; Shamsa and Latifa.
Sheikha Latifa bint Mohammed al-Maktoum drew worldwide attention in 2018 when a human rights group released a video made by her in which she described an attempt to escape Dubai.
Mr Raab told Sky News: "You can only watch the footage...and see that there is very distressing pictures, a very hard case".
'I have always raised human-rights issues, I always do, with foreign ministers, with the ambassadors, ' he told Sky News.
Ms Robinson, who is also a former UN High Commissioner for Human Rights, has written a number of books including Climate Justice, which was released in 2018.
I am really reaching a point now where I'm just getting so exhausted of everything - I just want to be free'.
He later told BBC Breakfast: "I've seen some of the footage and I think it's deeply troubling".
But Mr Raab said there was a "strict legal threshold" for such measures and they needed evidence of acts such as torture, forced labour or a killing. He added: "It's not simply the case that we can willy-nilly just slap sanctions on individuals".
When it was suggested that Princess Latifa's detention would constitute torture, he replied: "Conceivably it could do if there's the evidence and those facts are right. But I think even in the way you framed the question it's quite speculative".
Her friends say that Latifa has stopped sending secret video messages of late and that the United Nations must investigate, according to BBC Panorama.
Last year, a United Kingdom judge said that Al Maktoum had ordered the abduction of his daughters. In April 2019, his former wife Princess Haya of Jordan left Sheikh Mohammed bin Rashid Al Maktoum accompanied by her two kids and moved to live in the United Kingdom, where she launched a number of legal actions against him, accusing him of mistreatment and of trying to marry off their 11-year old daughter Jalila to the Crown Prince of Saudi Arabia.
"All the windows are barred shut, I can't open any windows". There's five policemen outside and two policewomen inside.
The footage shows Princess Latifa saying: 'I'm a hostage.
Foreign Secretary Dominic Raab said people "will want to see that she is alive and well" after she described in smuggled videos how she had been locked in a villa without access to sunlight or fresh air while under constant police guard.
She recorded them in a bathroom as it was the only door she could lock and she appears to be in a serious state of distress.
"We will certainly raise these new developments with the UAE", Colville said in a statement.
Ms Robinson has joined in calls for immediate worldwide action in order to establish Princess Latifa's current condition and whereabouts.