I think she'll stay as long as Evgenia stays in Canada, but I have no idea about her job. Perhaps she still can work for the same company from Canada, depending on the job it might be possible.
I am not sure how it will work with Zhenya's mom, because she would need a visa to be in Canada, which is not entirely trivial.
She could probably stay a couple of months as a tourist to help Zhenya to settle quite easily, but other than that...