Does my marriage stand valid if the Mehr is returned by my wife's parents?

My marriage is going through bad phase. My wife parents were at my home and they were arguing with me and at one point they returned the Mehr amount to me (my wife was also present that time). Initially I was not taking the cash but later I was forced to take it since I didnt want to have an ugly scene created in the house since they had already created lot of commotions. My question is does the marriage still stands valid?