im so sorry you have to go thru this. i know he has been the father figure for them for 5 years, but its his life and he can do as he pleases. the only thing you can do is trust him to make the right decision. if he loves you, he will stay with you, and do what is necessary to stay in His baby's life, as well as your children's; while avoiding the other mother as much as possible... if u are not a jealous person, this could work. i know he made the biggest mistake he could, but he will have to be judged by God for what he did. You should try to make the best of this situation, try your hardest to forgive him and move on as positive as possible. Ask the Lord to give you strength to deal with this. If you are not religous, then this sounds completely crazy, but give the Bible a chance because its FULL of answers to life! i just started reading the bible, and i feel i am already becoming a better person, im sure you will too. and u may have a better idea of how to deal with this.