Illegal relationship

Hi Sir, I was married on June 15, 2016 within two months I came to know She (village girl) is a character less after engagement and after marriage she seeking sexual relationship any persons because this marriage forcefully done ..this details got from whats up and message . Nearly she have six boy friends ..I have all the call details including what's up ,SMS .. after marriage some of her boy friend met secretly outside as well in her father home when alone .. More over still now We didn't had sex and she allowed for only foreplay First time we called her father for others relationship And given warning and excuse but within a short time she continues the same .. now we sent permently her father home and Now she denying to give divorce of her father prestige only prestige not an guilty .. Now how process this case Is there any possibility is nullify marriage We together leaved only four months without sexual Relationship now one year over we separated And not taken single rupee of dowry If apply divorce whether I need to pay maintenance Kindly suggest me.. Thanks, Sagar