Agreed. I also need to state that she is to have absolutely no contact with my kids whatsoever. That if he can't just focus on being a dad when he is with them, that privilege will be revoked.
I am planning on exposing to his family today and consulting with my lawyer. This evening (he has plans to meet with her) I will expose to her husband and then when he gets home from being with her I will confront him. I plan on taking the kids to my parent's cottage for the long weekend and will tell him to take the time to think about his choices, and if he chooses the affair to not be in the house when we return on Monday.