Hello i am searching for an asian war/thriller movie.

Plot: Young mother gives her first child to adoption due to war,then goes out to get him back but could not find him and ends up dragged in war as a spy to kill some important military person but gets caught and was imprisoned,tortured,ra*ed and got eventualy pregnant with her tortuer,but the war ended and she went to america where she had 2-3 kids and left them a note after her death to search for their father,(plot twist),their father is the first child she put to adoption because he climbed up in the military world as the best sniper in the army,and he caught her trying to kill the important military person but didnt know that she was his mother.

Please if somebody knows the name of the film let me know