Infidelity Support Group
Any relationship in which one partner engages willfully in sexual relations with another outside of the partnership is considered to have experienced infidelity. This breach of trust is often traumatizing for the faithful partner as well as the relationship, and support is often needed to heal emotionally and to decide whether or not the relationship should continue after...

If it hasn't been exposed yet... EXPOSED THE AFFAIR!
To family, friends, children, clergy, and especially, the lover's spouse be informed. If the affair is at the workplace each person's supervisor and/or the personnel department should be told, unless there is a policy the they will be fired for work relationships.
Other issues
Many betrayed spouses are afraid that exposure will drive the unfaithful spouse further away. While it's true that unfaithful spouses usually feel betrayed and angry when their affair is exposed, I regard that reaction as being part of the fog that most addicts experience. When the fog has finally lifted, and the source of addiction no longer has control, the value of exposure is usually conceded by the addict himself.
Some feel that an affair should not be exposed to children. Granted, I would not tell a 3-year old about an affair, simply because a child that young cannot possibly understand what it means. But I would not hesitate to reveal an affair to a child 7 years or older. Exposure to those between those ages should be a matter of discretion. (Explanation doesn't have to be graphic)
I exposed my H affair. All contact stopped immediately.
As to telling your children... I don't agree with that approach. You may inadvertently be resetting their own standards in morality, if they want to continue to love their father (and they will). They are children, not adults and cannot understand with maturity the situation. Children tend to be black and white in their perspectives and will not be able to handle the internal decisions you would be forcing on them. You are their mother, not a friend looking for reassurance from them as other friends. If everything proceeds in the worst way possible, they will know the truth in the years to come without your telling them now. Be the strong, reliable loving mother for them through the difficulties ahead and that will speak far louder than any story you tell of what their father has done.
Praying for strength and peace for you and your children.
I will say that talking to people who can relate helps. I stumbled across this group a few days ago. Before then, i had noone to discuss my feelings with. Even though his family and mine knows, they pretend everything is ok.
My only advice is to talk it out with others or you will lose yourself.
If my wife had not been repentant I would have divorced her as I don't need someone like that in my life. I'm giving a second chance to a woman who was like that, but is working to change into someone better.
"As to telling your children... I don't agree with that approach. You may inadvertently be resetting their own standards in morality, if they want to continue to love their father (and they will). They are children, not adults and cannot understand with maturity the situation. Children tend to be black and white in their perspectives and will not be able to handle the internal decisions you would be forcing on them."
I beg to differ that nothing could be further from the truth. And I think it would be safe to say you don't have a diploma in child psychology, LOL. Those who believe this, that they keep it from the children to protect them, do so because of their own shame around the infidelity. It has nothing to do with protecting the children, and everything to do with protecting themselves from their children's and others' judgement. It's cowardly, controlling and disrespectful, and done to serve the parent's purposes, not the children's.
Cuppy213 it doesn't sound like your cheating husband has much respect for you, even after all the things you've done for him and his children (I'm presuming their his?). It's natural that you would feel hurt amongst many other things.
The only way I can see out is to pack your bags and leave. He doesn't sound like much of a catch so what is it in particular that keeps you hanging on? If you've been together for a long time, I'd go and seek the advice of a lawyer (many offer a free half-hour consultation) to find out what your rights are.
Keeping yourself stuck, like so many betrayed spouses do, trying to figure out the why and how their CS could do this to them, is futile. There will never be a good enough reason for what they've done, so to dwell on it is purely an exercise in self torture. Stop doing this. Empower yourself. You know you're a good and decent person who could never do this to anyone. Go with that and don't look back. If anything, spend the time figuring out why you'd want to stay with someone who has done this to you, and why you'd get involved with someone capable of doing it.
Wishing you well.
Is he happy within, does he love himself? If no, and I suspect that such is so, then he has problems that quite possibly require professional attention.
Ideal relationships, although rare, are so because both parties are self-happy and self-loving, neither is dependent on the other re emotional stimulation. Do you depend on him re your happiness and loving and, does he depend on you in the same way?
The biggest problem I found impossible to overcome when I was cheated upon was being able to forget, I loved her the same, but I found it impossible to believe she would never do it again given she did it the once already, with the sad thing about that being, she quite possibly would never have done, I wasn't prepared to take the punt. I made the right decision, whatever decision I made would have been.
You now have a decision to make, those of us who have been there and done that say it is an easy one, given that you never have makes it instead a tough one. Whatever your decision it will be right for the time. Good luck.