Need a Legal help... how to rid off from the unwanted.

Hi Sir, I'm 29 yr old Muslim guy staying in Mumbai, Last year i had a small duration affair with a girl who is also working in the same office, when i try to take saperation from her she says that she is pregnant. Then we go to hospital and takes madicine but she didn't take it says then she has been taken the medicine but the medicine didn't work, then again we go to hospital and did the same but she didn't take that pills and start blackmailing me that you have to marry me otherwise she will file a case of rape. I was scared and try hard to convince her to abort or we will marry later becase of the family, Relatives problems. but she didn't ready for that and when i feel helpless then i did marry with her as per muslim retuals. After marry we staying together and she left the job and starting planning how she can tourchered me with her ex boyfriend and she invited him at home too. after few month someone tells me and also i got her phone a listen the call recording about plannig to implicate me at the time of delivery. after delivery of the baby she started torture to my family which was unaware about our marrige time ( after few days of nikah my family and relatives got the information through my wife relatives and they start harassing through the tauntness and sulfer) also reached at my native place without my permission, after that she goes to her own home and report in the police station, against me and my family for domestic voilence and dowery. what i have to do now while i have her pics with bf and other proof of his planning. Should i sent her a Talaaq ? Now i don't want to have a single moment of my life with her. Can i Start job again? becase of this i lost my job too.