How can i get my girl back

I am married to a wife with two kids, but still in love with another girl whom i met not quite long, about eight months now, i felt in love with this girl imidiately after chating with her for few hours, I told her her evrything about me including my marrital status and later told her my feeling about her, she accepted my offer and even agree to be my second wife. I developed more interest on this girl and the relationship keept growing faster every day. But my problem now is that her parent are against our relationship after they discover about my wife. I love this girl so much and i don`t want to loose her. Please, what do i do.
thank you.

Hi Omar, welcome to the forum I hope you will like it here.

Is it customary in Nigeria to marry more than one wife? It is important to know that before any advise can be given. How does your first wife feel about all this?