Need suggestion on Men Rights on force marriage

I m 35 years Male and married 3 years back. Before marriage i had proposed a girl who was 12 years younger then me. I had proposed that i like her n love her. But since i know i was at the age of 32 i had to marry soon, so after many thoughts i hv decided that i hv to marry as per my family expectation, so after 7-15 days i hv clearly told this girl this that i cant marry you as you r just 18-19 yrs old and am 32-33 yrs old and since family is already searching groom for me do i had to marry. She understood and me too and we seperated mutually and still we have not met a single time. Then i got married and now 3 yrs gone, Aftee 3 yrs again we contacted We had talked for 1 month and decided to meet for 1st time. And since we stayed jointly for 4-5 days we had sex. Now that girl is forcing me to marry her and saying to give divorce. She is threatning n forcing on daily basis. And she also called to my wife about this sex. Pls help how to escape and my legal rights.