Please I Need Your Advice ....Here Is My Problem

my wife of fifteen years left me in Lagos to work for her ex boy friend in the east. It all started one evening she got a call that she should come to take a job at the state capital. She asked me if she can go I said if you want. She did not tell me the relationship she has with the caller she said its from someone she gave her CV.
She asked me to book flight for her because she will go in the morning and I did. Two days later she called that I should book flight for her to come back and I did. A day later she called that they called that she should come and resume the next day, I made another flight booking for her. When I travelled for Christmas holiday I saw she was very happy but was surprised to hear that she was paid only forty thousand naira as her salary for the month. Last year when I moved to Lagos from where we were she left a job that pays her two hundred thousand naira plus car and driver on the reason that the family should stay tougher. This got me thinking that there must be other reason for the relocation. I got a call yesterday and I was asked why I left my wife to and work for her Politian ex boyfriend if am tired of the marriage. I called her to know the relationship she has with the man that gave her work she confirmed he is her ex boyfriend. I told her she can not marry two men at a time. she has chosen to be mistress to a politician she should pack out of my house.
She is begging that I should forgive her. my problem now is if she can do this when I can pay my bills comfortably, what will she do if situation changes tomorrow.
Please help advice him.....