Harrasment from wife

I am married to a girl who is relation of me .I am married to her a year before.Things were better for the 5-6 months.From last 6 months her attitude has drastically changed.She is a post graduate and is currently working in a firm with salary of 13k.Interference of her father in our marital life was noticed by me since our marriage.He used to make calls to his daughter (my wife) even at late night 11-11.30 and when I asked him about this then his answer was "when ever I will get time I will call my daughter".This was the first time which caused clashes between us as I was doing morning shift and I had to leave home by 7.30 am.I work in a reputed MNC with salary of 20 k so I discussed with her regarding the expenses in the house and how much share she has to give.She denied for giving her share and started quarrelling from that moment.she had not given anything from last 5 months and being a husband I asked her about it and she had no answer about the salary money from last 5 months.In the recent incident on 21jan I visited Mumbai for Ganesh puja at our relative place.while coming from there I told her to remove her mangalsutra while boarding local train.The mangalsutra was almost of 35gm.when we returned from there one day after she checked the bag and started yelling as mangalsutra had been vanished or theft.On 22 Jan this incident happened.The bag was not torn or neither there was damage.She left home on 24 Jan by calling her brother in Office but there was no quarrelling or nothing on that day.I also have the audio clips of that call records.she went to her father's place and started telling as my husband is not ready to stay with my and he is doing it with the saying of mother in law.I am the only son of my parents so there is some sort of sharing with my mother.I made a call to her father but he was not ready to speak with me and her brother came on call.she slightly misbehaved with me on call so I told them not to send their daughter.For 15 days she was not at my home.First 2 days she was at her father's place and after that she came to my city and continued her job by staying at her maternal relative house.After 15 days she had returned home because of her uncle(father's brother) intervention she had came home but she had returned with same attitude.She told me that she is going to give such a gift on our first anniversary that I will not forget it my whole life.so I am feeling that she knows about mangalsutra and wants to put blame on me.After her return to my home her dad had not made a single call from which I understand that there is some plan in her mind as daily she is giving mental stress to me.I need a advice on this. Regards, Vabbhy.