Yuri only smiled along because she thought he was only being egoistic until he started to stretch his hands towards her family.
The man she married who had only just became the President for a year, started to scheme against her family and wanted to bring them down.
The only time the Mo family abandoned him was when he first started out as a politician. They only did that to make him gain experience and know how dangerous the political world was.
Even though the Mo family did nothing to help him, the Mo name alone was enough to pave a way for him, well it did. Things became too easy for him which was the opposite of what the Mo family wanted, so for that, Old Man Mo made an announcement that the Mo family wants their son-in-law to gain experience and shouldn't be given a free pass.
Well, guess that dealt a blow to Yuri's husband which angered him to try to win and prove a point to the Mo family but failed miserably all the time.