Both she and my son are 25 and have been together for just over 9 years. and are getting married in 3 weeks. I received an e-mail from someone who has sent me evidence that she and his BFF they have been seeing each other every other day for about 4 months. Most of the time it happens it when he's out of town town or at work. I know that she cheated on him last night. I have NO idea how to handle this. Hey Parents out there as a Mom , should I say anything to my son or just let it work itself out and he will figure it out soon enough?