It is SA but due to being a spy or whatever agent they are if she indeed got capture by enemy, they will do anything to make her talk. His doing it to make her realize how dangerous it will be if she stay for work.
Plot needed for the story, his doing it to make her quit and make her realize how dangerous the work she wanted to be a part just to find her husband. He makes sense by doing it if you think about it.
Atp i need spoilers for how this ends, pls spare me my sanity bcs i cant handle reading this with that asshole anymore..