Dear NYgirl, I wish you would check in with us.
There has been some very excellent advice on this thread, and it all comes from experience and concern.
You have joined a community of people now. You are not on your own here.
I have spent the night going through this particular thread. Here are some of my thoughts
1) I think that people are right that this is possibly the tip of the iceberg with respect to betrayal, BUT, I truly believe in this case, you don't need to see the rest of the iceberg, (i.e. you do not need to know any more details, it might be there and it might not, but I believe in your case, it will only traumatize you worse knowing what else may or may not have been going on. Going NO CONTACT from your husband may save you years of pain that you didn't ask for.
2) This is a Trauma with a capital T. I believe others are also recommending this, spend this Sunday looking for a therapist that specializes in Trauma, and call first thing on Monday and get the earliest appointment they have.
3) if you can talk to your son, if you could book the same therapist for your son I think that may be helpful as well. Or a therapist that also specializes in trauma.
4) Find a lawyer. Book the lawyer on Monday for the earliest appointment you can get. Even if it is just a preliminary appointment. This will help you move forward.
5) do NOT drink Alcohol or take any type of street drug during this time. Get to your family physician as soon as possible and discuss what ever symptoms you may be having so that they can possibly prescribe you something to help through this very difficult time. Alcohol can actually make the situation much much worse.
6) Ignore your mother-in-law and listen to your friends and the people here that have years of experience.
7) read the thread everyone has been recommending about the double betrayal under the "I can relate" forum. http://www.survivinginfidelity.com/forums.asp?tid=512858
Now for me to be a little gentle, we all understand the need to want to try to save the marriage because at the time of discovery, a great deal of us were still in love. This is not an easy thing. Our minds go into shock and we believe that there might be some explanation to make this all go away. It is like when someone passes away or something very bad happens. Our first instinct is denial. The problem with denial in these cases is that it leads to us asking questions, which for some cases, and I believe this one falls into the category, the discussions actually cause more harm than good. The answers in this case cannot help you or your son. It really does not matter who seduced who, it does not matter any of these things, in my opinion (IMO). what I believe matters right now is getting your son and yourself as safe as possible with as much support as you can.
We are all so sorry that you are here. We really do want you to check back in, just to say you have read some stuff and you are getting help. This is a pain that none of us asked for. There are so many good spouses on this site that were terrific partners. This is probably one of the hardest things to believe, but you did nothing to deserve this. Nothing.
Please take very good care of you!
[This message edited by DdV65 at 6:49 AM, November 6th (Sunday)]