First of all, I haven't defined controlling behavior. Second of all, I am attacking no one. Third of all, anyone who prevents someone from doing something is controlling them. I really think you are confusing control with justification of that control.
Okay, I'll play along. Was BC justified in taking the passports? If so, I'll agree that by controlling the passports, he controlled her ability to leave the country with his kids without his consent. And by her having the passports prior to him taking them, she controlled his ability to do the same.