Would you stay in this marriage?

Would you stay in a marriage if your husband confessed that he was cheating on you for a year and a half with a gal he started a business with. He was told to end this relationship and business and still has not. It has been 6 months so far and he is still seeing her. The children are 17 and 20. The wife demanded a vasectomy from the husband and he did this. The wife will not have until the relationship with the business partner is over....then she will decide what happens. Prior to him telling the wife about his affair they may of had once every 5 years and have been married for 27 years? Would you stay married to this guy?