So here are my thoughts, questions whatever...

Does she come home falling down, incoherent drunk?
Does she come home wasted on drugs?
Is she verbally or physically abusive?
Is she cheating?
Does she lie to you about where she has been?

If you said no to these then you are controlling. She isn't doing anything wrong!

But you are!

You trying to control her with your anger and jealousy will only push her away. I think that may already be part of the problem. Who wants to be around someone who tries to keep them on such a short leash?

Cultural or not. Reign it in man or you will lose her!