A girl has followed him to Dubai and is.maintaining a relationship with my husband there.
Plz advise how i can teach her a lesson and get rid of her.
This is an act of adultery.
However there is no law to take an action against her to teach her a lesson.
It is because of your husband given her room that she is occupying it.
So he only is held liable for this offence and crime against you.
You may call your husband and warn him to leave er company or to face legal consequences.
If he is not listening then you may issue notice instructing him to keep away from her or to face divorce proceedings in the court on the grounds of adultery.
Subsequently you can file a divorce case on the grounds of adultery and she can be impleaded as a 2nd respondent.