We ask the family

Oh I am so sorry to hear this.., Is this confirmed..how did you knew about it? It is painful to be betrayed by someone you love.., you will be hurt and be disappointed with yourself too.., you'll be wondering what you haven't done for her to search her happiness from another person.. If you really love her.., try to talk to her..and see if you can afford to forgive her..=)

just investigate it first. is it really an affair or just a good friend. we need to know more detail before making a decision. and if it yes it is an affair, let her choose between u or the affair.