This is a very upsetting time, and if you have just found out about the affair you must feel so betrayed, hurt and also angry. I agree with the last post, I do not think you should tell the children of the affair, although there is a part of you that probably wants to, as you know it will be very hurtful to him to be diminished in their eyes. However this is not the best thing for them and they are not old enough to understand anyway. Believe me in time they will come to know when they are mature enough to handle it. Also there are always reasons behind these things, and although he was totally wrong to hide it from you, and may just be a complete *******, maybe there could be another side to it ... maybe he really was torn etc... is there any chance that once you have had some time you might be able to pick up the threads and start again ?? Probably impossible but that would be best. I think the thing you must do is never make the girls feel as if they have torn loyalties, and never make them feel that you disapprove of them seeing him or run him down in front of them. That will only add to their sadness. Also do not rush into giving up your home or into anything ...... Anyway good luck.