Forgotten Title Mc transmigrates into a wife that is trying to betray her husband to the enemy forces

Ancient setting
I don't remember if she is just selling his information to the enemy or trying to kill him
The husband already knows of the wife's "good deeds", i dont remember if he is reborn or not
He is waiting to catch her in the act, but gets confused by her change, and by her constant protection of him, even against assassins (at first he thinks they are her work, and its all like "sure enough, i wasn't wrong")
I think there is a tone of comedy in this work

If you can remember what work is this, please tell me.

 

That sounds vaguely similar

 

My Husband Caught Me Having an Affair

I’m not sure about the assassins because I didn’t read that far, but the original was being tricked into giving up secrets and the husband seems to know what’s up.

 

No, it's not this one. I think it was a chinese novel

 

Are they on their way to exile when the novel starts?