Ms Cruz would have become a citizen 1 year after Raphael.
In addition to those people who became Canadian citizens upon the coming into force of the Act (popularly known as the “1947 Act” due to the year it came into force), citizenship afterwards was generally acquired as follows:
....
grant of citizenship to a foreign woman married to a Canadian man after one year’s residence as a landed immigrant....
https://en.wikipedia.org/wiki/History_of_Canadian_nationality_law
In addition to those people who became Canadian citizens upon the coming into force of the Act (popularly known as the “1947 Act” due to the year it came into force), citizenship afterwards was generally acquired as follows:
.... grant of citizenship to a foreign woman married to a Canadian man after one year’s residence as a landed immigrant....
Hoo boy. So Mrs Cruz could have or would have become a Canadian citizen in 1969, since Cruz Sr became one in 1968. So if that is accurate, then Cruz Jr was born in Canada to two Canadian citizens. If those were the circumantances, he would not have any claim to any kind of US citizenship at all, unless he becames naturalized at some point.
So Mrs Cruz would have had to go through an application process to become a Canadian citizen, I would assume.