What if MS advisor pad his wife's name into my conference and journal publications?
This sort of &quot;guest&quot; authorship is not unheard of. For instance, that may be why Chinese universities primarily give credit to the first or corresponding authors of papers (as opposed to other authors, who may be &quot;guest&quot; authors).
Assuming your description of the situation is correct, including another PhD student who had little to no contribution as the second author, especially one with a personal connection to the advisor, is definitely ethically questionable. It's good that you noticed and disagree with it.
Practically speaking, it's much easier to raise this issue after you have graduated and received any recommendation letters you need from your advisor. For instance, if indeed you are submitting in a few months, you could delay submission of the papers until afterwards. Alternatively, even if you submit a paper with a non-contributing second author, as the first author you will still receive the primary credit from any applications of your CV.