I'm really sorry and horrified to hear about your night last night. I completely agree with what Saffie and JCJ are saying. This has to stop now. Your wife is manipulating you and you can't let her keep doing that. You've done well keeping the marital bed. Now extend that to other aspects of your life.
I really wish you hadn't signed those papers. It sounds as though your wife was acting out of complete desperation there trying to get you to sign them. If they were fair I'm sure she wouldn't be so adamant to get it done right away. Please take them to your solicitor.
Also, like JCJ says, learn to walk away. Bite your tongue, go for a walk, go and knock 7 shades out of a punch bag or something. Just don't let your wife bully you. Especially not in front of the kids. You sound like a nice guy and definitely don't deserve this type of treatment. Nobody does. Keep telling yourself that. You need to stand up for your beliefs and the well being of your children.
I would advise you right now to not even think about what you can do to regain your marriage. That's a long way off. I'm not saying it won't happen though. Right now you want to be thinking only about you and your kids. Let your wife rant and rave, let her scream. That's her problem. You need to detatch yourself from it NOW! Please, before she does any more damage.
Kev
Me: 32, Wife: 22 Son: 2 Married: 2 years Separated: January 5th 2009
Sometimes you have to become lost before you can find yourself.