Hi bedman. Very sorry you find yourself on SI but you have come to the right place.
I agree with much of what Stronger posted. I believe what you are seeing is regret for getting caught. Not true remorse. Let me explain a bit about my own story as I found out and read the exact same detaisl you did. But I'm going to come at this with a slightly different perspective that you may not have thought of before.
Yup. I read through that God awful diary. Every detail about what they did sexually. Special occasions, sex sessions and details of those at her sister's house, sex sessions and details of those at "friends" houses. I got to read about what her AP tasted like, size description, how good he was in bed, positions. I also got to read about how good she thought she was as well. I've talked about this in IC (independent counseling). It's tough to differentiate between what's real and what is fantasy. So much of an A, and what is written about them, are actually not true. Not necessarily what they did, but how good it actually was.
Ready for it? This is not my wife I'm talking about but my mother. I am what you would call a BC (betrayed child). I was 16 (now 42) when I read that diary. There was even more in there but I don't want to get too far off track as that's a whole other separate discussion. But my mother brought her affair into our house in many ways. Her diary was just one. My younger brother who was 13 at the time found it first and then left it out as he didn't know what to do with it. I read the diary next and was the one that reacted and exposed. I sat my father down and told him what my mother was up to. He insisted on reading that diary cover to cover as well. I watched the life drain out of him as he read it. Page after page. I can honestly say that the diary marks a point in my life and I can refer to parts of my life as pre diary and post diary.
For the next 5-6 years I watched my father do everything wrong. He did what's called the "pick me" dance for years. After that initial confrontation where he let her have it, he then spoiled her. Bought gifts, flowers, trips for just the two of them, remodeled the house for her, anything he could do to "win her back". Guess what? She abused the shit out of him and us as a family for that matter. Dday 2, 3, 4, 5, 6, 7... too many to count. My mother refused to stop seeing her AP and guess who caught her each and every time? Yup. Myself. I'm also assuming my brother. And each time I had to tell my father.
Point is, and from a different perspective that you may not see, is that your wife brought the A into your family's house and in more ways than one. Not only is what she documented in her diary one way the kids could find out, or texts as a few other BC here have found, but she forever changed the environment in your household with her behavior. She changed the dynamic between the two of you which your kids do pick up on regardless if they know about the A or not. Her selfishness and time with AP takes away from time with the family. Trust me I know my mother chose AP over the rest of us. Repeatedly. Because she could and wanted to.
Does she still have that diary? There are a couple of aspects that I have discussed in IC about that diary. She doesn't write such salacious details for no reason. Those details are meant to be read. Otherwise why write then and increase chances of getting caught. They are meant to be read by herself. In that sense the diary is a trophy. More accurately it's a direct connection to her AP. She gets to keep reliving her experiences over and over by reading what she wrote. Not sure if this would be your case, but in my father's case the diary was a weapon in two ways. She was pissed at my father and that was quite clear in her writing. It was a way for her to communicate indirectly just how pissed and entitled she was. Entitlement. Further, it was a way for her to emasculate him. I may not have know that word as a 16yo kid, but I certainly got to see the effects and I understood probably how that felt to my father. The diary needs to be burned if it's still around to break that connection to what she has in there.
The point of all this is not only did she cheat on you, but she cheated on the whole family. She deliberately brought the A into your house without thinking of any of the repercussions to the rest of the family, or maybe she did and just discarded the repercussions. In my book, and I'm only scratching the surface here, that makes her a shitty mother in addition to being a shitty wife.
At this point, what you are most likely getting is regret for being caught from your WW and not true remorse. True remorse often doesn't come until later and most of the time not at all. Here I am 27 years after my mother's A and she's still blame shifting and refuses to take any responsibility for it. My father started an A of his own and D her 6 years later. As far as I know the A went on the entire time and even afterwards. Her AP is now divorced with more time on his hands. How do you know that this has not gone underground and she is placating you? Especially where you have to give her all the direction on how to help you.
I think it's a bit early to determine which course you want to take as far as R or D. But I would start with consequences for her actions which consists of several things.
First, if you haven't already, consult with a lawyer. You need to educate yourself on the laws of your state for both R or D as they both could have different impacts on you. As your situation continues to unfold you will be able to make educated decisions regarding finances, living arrangements, the kids, etc. Also, seeing a lawyer will take away some of the fear of the unknown.
Next, gently here, you both need to get tested for STDs asap. Too many come through here only to find out that they have something later. This is for your health and a must step.
Exposure. You said the OBS who was already getting divorced knows. What about friends and family. The more people that know, that makes it that much harder to take underground. I'm all for exposure because in our situation, I don't think there was enough of it to put an end to things. However, if you do open that door, you can't close it. Requires some thought here on your part.
Your kids probably know more than you think they do. Most of us here who have a BC background with also being a BS (betrayed spouse) or just a BC did. Even if they don't know, their environment is forever changed and what you do with that environment is what matters. Our house turned toxic on many levels after dday. Though to the outside world everything was fine. My father couldn't see past his own pain to see what was going on with my brother and I. My mother was too wrapped up in her A to give a shit about anything else. So what about notifying your kids counselors at school to keep an eye on them. Or possibly getting recommendations for child psychologists that can help you determine their needs? Several here have taken those steps has helped their situations.
What about IC for your WW. Regardless if D or R, she is not a safe person for anyone. Why would she do this to you, jeopardize her family's well being, and most importantly to herself? All affairs have at least two things in common. Your WW had to be selfish and have poor boundaries to do what she did in the first place? Why? Not for you to answer but for her to dig deep and work on herself.
Has an NC (no contact) message been sent?
Those are starting points but there is more. Here are also some links to get you started on SI. You can find most of the abbreviations here in the upper left corner in the Healing Library. Please check that section out.
http://www.survivinginfidelity.com/library.asp
Read up on the 180 so that you can decide if you want to use it later. It is designed for you to detach and can be found under BS FAQ here:
http://www.survivinginfidelity.com/faq_bs.asp#FAQ11
And more 180 info under the target thread here:
http://www.survivinginfidelity.com/forums.asp?tid=232785
I would also recommend reading these target threads in the Just Found Out forum:
Tactical Primer
http://www.survivinginfidelity.com/forums.asp?tid=235051
Great Posts for Newbies to Read
http://www.survivinginfidelity.com/forums.asp?tid=361740
Boundaries and Consequences 101 for all new BS
http://www.survivinginfidelity.com/forums.asp?tid=385631
Before You Say Reconcile...
http://www.survivinginfidelity.com/forums.asp?tid=406548
Before you say reconcile...Recover!
http://www.survivinginfidelity.com/forums.asp?tid=561390
For the newly betrayed
http://www.survivinginfidelity.com/forums.asp?tid=535178
For the foggy, unremorseful, cake eaters:
20/20 Hindsight: What I should have done when I J F O
http://www.survivinginfidelity.com/forums.asp?tid=446349
Codependency in the Marriage: A BS’s common mistake
http://www.survivinginfidelity.com/forums.asp?tid=408443
My 10,000th post - You Are Going To Be Ok
http://www.survivinginfidelity.com/forums.asp?tid=502703
Another Great Post for Newbies to read
http://www.survivinginfidelity.com/forums.asp?tid=532395
Please read these as well as prep for any sort of upcoming confrontation that you may have with your WS:
http://www.survivinginfidelity.com/healing_library/confrontation/no_contact.asp
http://www.survivinginfidelity.com/healing_library/confrontation/boundaries.asp
Calling all BSs...:
http://www.survivinginfidelity.com/forums.asp?tid=514479
Choosing an IC/MC:
http://www.survivinginfidelity.com/forums.asp?tid=544948
Very sorry you are here bedman. Keep reading. Keep posting. We are here for you.
yop