Gloria Macleod, whose husband Robert grew up in Dingwall in the Scottish Highlands but is currently working in Dubai, was refused entry to the UK at Inverness airport on Monday after being told she did not have the correct visa.
She was placed on a temporary admission order, which expires tomorrow.
Local MP Ian Blackford is in talks with the UK Home Office about Macleod's situation, which could see her daughters left in the care of elderly grandparents if she is deported.
The children were enrolled in a local school in the area.
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She holds a UK C-visit passport, issued by the British Consulate in Abu Dhabi in December 2009 and is valid for 10 years.
To allow her to stay with her children in Dingwall, Macleod and her husband made an application to stay in the UK while Robert Macleod continued to work in Dubai.
Blackford said the Macleods were advised by the Visa Office, acting on behalf of the UK Immigration Service, that this application had to be lodged in person in Dubai after which she would be able to return to the UK.
"What is beyond understanding is the attitude of the Home Office, who are removing a mother from her family, leaving two young girls in the care of elderly and infirm grandparents for no apparent reason. This must not be allowed to happen and I will do all I can to stop this madness immediately," he added.