Praise be to Allah.
I put this question to our shaykh, ‘Abd ar-Rahman al-Barrak (may Allah preserve him) and he said:
Because of the possible loss of money, and because it will be too difficult to get another visa, and there is the need to be reunited with your mother now and in the future, there is nothing wrong with her travelling and coming to complete her ‘iddah with you. End quote.
See also the answer to question no. 98193 .
And Allah knows best.