MrsDotoomuch,
Why do you think you went onto ignore all the counsel the first time around?. Scared, ashamed embarrassed, what were the reasons?. Think you need to address that question as well to your own self. Following on from that I think you also need to ask yourself what you are getting out of this relationship now. There must be something keeping you there otherwise you would be long gone by now so what's happening with you?.
What did you learn yourself about relationships from your own parents when growing up?.
He is neither a good dad nor a good husband to you if he is behaving like this. You have taken him back time and time again and he knows you far better than you know him in that he can still play you for a fool. Two affairs, a football obsession, no sense of financial responsibility and a long standing problem with alcoholism and you're still there!. Pah!!. He knows that he can do anything he likes and you'll still be around enabling him to continue. Happy days for him but not for you or your children.
You have also played a part (primarily that of enabler) in making the relationship the way it now is. Is this really what you want to pass onto your children, the legacy if you will. Some legacy that is for them. They will indeed be fortunate not to end up in the same type of dysfunctional relationship themselves if you were to remain with him.
Your children probably wonder why on earth you remain with such a damaged soul and they won't thank you for doing so either in the long term. They will come to call you a silly cow for staying and wonder why you put him before them when they were children. You were not put here to rescue and or save someone who ultimately does not want to be saved.
What you are doing now is also teaching your children damaging lessons regarding relationships. You are both teaching them damaging lessons.
What he is also now doing as well is dragging you all down with him. He is more than happy to do that and you're allowing it also to happen.
I feel the most for your children in all this because both their parents are failing them. They don't have a choice ultimately re this man but you do.