OP, I am sorry to hear about it.

From the beginning I knew that either he is cheating or is planning to do it soon. It wasn’t only the Tweeter issue but his behavior changes and lies. Men would never admit to cheating and would even swear on their mothers grave that it’s not true. Looks to me like he met this other woman sometime ago and from your posts I suspect (forgive me, please) that he may be even in love with her. However, sometimes men mistake love with sex... Probably he wants to moved out and be with her. It may be the reason why he finally told you about her. Otherwise, he would continue to use her for sex and lay to you just to keep the family life.

It wouldn’t surprise me if he gives you soon an ultimatum, either you let him stay home and cheat or he is moving out. It’s up to you what you are going to do and no one should judge you. With time he may come to his senses and be begging you for forgiveness on his knees but it may be a very long time. The brain reacts to “in love” for two and sometimes even three years. Right now his brain is in a cloud No. 9 and he is not thinking straight. The question is, do you want to live with that rat under the same roof and support him financially?

I would be concerned about your finances. If he is not such a good lover then he probably is spending money on the other woman to please her, and if he is not working where are the money coming from? For the first time he doesn’t want to do together taxes with you and it should be a red light. Is he borrowing under your name or re-mortgaged house without your knowledge which shouldn’t happen but unfortunately is possible. What are your assets like home value, bonds, etc. You have to think now about your and your children future and to get most of your marriage financially, you need a private eye to have the dirty stuff on him and a good lawyer. Keep in mind that attorneys are costly so keep their hours down or you may be lucky to find one who would accept your case on contingency fees.

Good luck and remember that there is a light at the end of the tunnel.