Can wife file dowry case after 8 months of nullify marriage petition

My Marriage happened on Sept 2023. After the Pheras, the girl refused to go to my home in Ambala stating that she has done marriage forcefully due to pressure of her parents. After then the girl family went back on same night along with the girl to there home New Delhi stating that girl condition is not well at that time. We filed the Null petition for having fraud with us immediately in the Family court since the girl has not arrived in my home and run away after the wedding pheras. Now she appeared in the court 2 times and there family is saying that now she is ready to go to Ambala. They are threatening us for money demand and to take case back during this period. After 8 months of case already filed, now they have filed a false case of Dowry in Women Cell Delhi. All the marriage expenses has been done by us and we have all the bills also. Can a girl file a false case even after a fraud case is running on her in the Family court? How I can make me and my Family safe from this. Can you please help. We are very much stressed as first they did a fraud with us and now they are filing wrong case.