Well this is very bizarre. I think time will heal you. Dont destroy ur wifes life, try to be happy with her. She doesnt deserve to suffer because of your past. Your mistake and u cant even correct it. Its too late. But what u can do is make good life with ur current wife. Dont treat her bad. Paap laagla. Seems like u r a religious person, thats why am saying it, treat ur current relationship good. Those who linger on past usually follows miserable life.
Good luck.