Crossing the Canadian / US border ..You cross the border but don’t actually enter the US and return to the canadian border . At the border you can request for an OWP and you will get it same day instead of having to wait for months through IRCC applicationit was approved for all of us . Once the principal applicant is approved all other dependents are approved 95% of the time. She can just get a leave letter from the embassy addressed to the embassy in your home country . When visitor visa is approved it will be for the whole validity of her passport ( if 5 or 10 yrs ) so it doesnt matter if she mentions shes only accompanying you for her leave period . You are the principal applicant more focus will be on you.