I'm not and I told her exactly the same. She's not there to be tested. She's approved. If that was a relationship interview than it was a different history. Told her they just want to confirm some data that's it. Some people told they may ask as well when did her last entry Canada which she also knows but she seems to be way more nervous than I am.There is no way to know for certain. Those are the only ones we were asked at Kitchener. Keep in mind (and share with her), it's not a test. It's simple questions that everyone knows the answers to (they and your wife). If she has someone translating, then it will be fine. Don't over think this.
To me it's all over already, she's approved, there's no way to step this back but she's really nervous and will not relax until the COPR is in her hand.