My sister married to a Canadian national in march 2019, my sister had a divorce from her first husband in 2015, and have 2 daughters. Now she married to a Canadian national who's applying for a visit visa for her only. Whereas he supposed to call his wife and the daughters on the same time. So my question is can a Canadian national apply for his wife a visit visa or he has to apply for the right category which is spouse visa.
Also please if you can help us how my sister's daughters age 7&5 can go to Canada with my sister.
Many thanks in advance.