Although they will try to talk you out of getting a "worldly Divorce" they can not D\F you for this unless someone committs adultrey.
What I have seen happen is that if someone has sex after the divorce and it is not connected to the failed marriage, some congos will just privately reprove the person, especially if you are going to get married, and especially if you were perceived in the congo as the injured party in the original marriage.
It also doesn't hurt if your family is held in high esteem in the circuit.