This is a difficult question, for one I can't wait to see how they will go over this. US is her husband, so he genuinely has the right to at least question where she disappeared to. But he cannot be such an idiot, he forced Kanak to marry him, he cannot possibly believe that within a few day's Kanak accepted their marriage. Although, Kanak may have mislead him to believe she has, with her actions, which were all motivated by getting the papers. So in this sense, I think he does have the right to question her, especially now that she willingly has returned.
They've made this whole situation really messy, US forced Kanak into marrying him and not even once did we see Kanak look at US with a bit of like or oh my heart just skipped a beat, all that falling in love stuff. So as a viewer we got to see a girl motivated by papers to stay with a man that forced her into marriage, the girl finally escaping and then the girl returning. Hypocrisy at it's finest.
I can't wait to hear Kanak's explanation as to why she ran away.