Sending a notice to come back home

Hi, My self Nadim A. Khan I got married on 21/4/2013 since my marriage I am facing a problem with my wife that she want to visit her parent house for on every week for 3 to 4 days stay I tried very hard to hold her to stay with me but when ever I said not to visit her parents house she started hitting him self so sent her back to his family then she stay there for 5 month and suddenly she come back. After staying a couple of days see thing started happening again at the same time she got pregnant and ask me to sent her back home to his mother and I refuse to her cause Dr suggest that she is not capable to travel for couple of month but she started creating a scene in home. So I called her father and hand over her to him on 1 month of pregnancy still then seven month no call nothing even those people change the house I called to every one bit no responce and one day she called and ask for the sum money for a baby stuff to buy I refuse her for money and said if you want to take care of you both so please come back to me she replied me leave your parents and stay with me here near by my parents house. Now what should I do. Please suggest me I don't want lose her in any cost because I love them both. Regards Nadim khan I