I had kids at almost the exact same age that yours are when it came time for separation/divorce. My oldest was 7 at the time. He needed his own very separate conversation from the younger two. Yours will, too.
I agree about being honest. At the same time, in no way do I support any sort of full-on disclosure about what happened. Impossible for a 7yo to process, as I'm sure you're already quite aware.
We (let's just say *I*, since I did 95% of the reading) read a few books before disclosing and explaining to him. I wish I could remember exactly which ones and what sections were most helpful, but it's been a few years. I'd recommend you get a book or two. I'm positive one of them was "The Co-Parenting Handbook."
Our approach was this:
1) Figure out who would say what and what we would say.
2) Limit it all to a few standard points so as not to overwhelm him.
3) Prepare to spend the bulk of time after initial disclosure of separation/divorce comforting, reassuring, and answering questions. Prepare for what those questions and answers might be.
As for how much "truth" to tell him, and what our major points were? Our go-to lines were:
1) Mom and Dad discovered that we can't love each other the way married people are supposed to.
2) We are still your parents, and we still love you very much, and we're still 100% here for you.
3) Things are going to change, but that will not change how much you're loved and cared for.
I still stand very strongly by that approach, for my kid and my situation. No matter how much I hear it here, I cannot fathom talking to him about broken promises, broken trust, broken vows, or one parent ruining things. For me/us, that would not have been appropriate.
He inevitably had a million and one questions, both in the moment and beyond. He was shocked, sad, angry, and worried.
Some common questions and answers for us (obviously there was more nuance and more talk, but hopefully you get the gist):
Q: Why? Why are you doing this?
A: We have found that we can't love each other the way that married people are supposed to, and we can't do the things that married people are supposed to do.
Q: Do you still love Mom/Dad?
A: I love that she's your mom. There are so many awesome things about your mom!
Q: What exactly happened to make you do this? Can't you just work on not fighting anymore?
A: Those are really grown-up problems, and they are for grown-ups to deal with. You're an awesome kid, and you should worry about kid things!
~
The real work came after this, of course. For years, up until the present day, my son has asked questions. These are still my go-to. For so many reasons that are relevant to my situation, but I also think are kinda universal.
To be clear: I have never lied to him; I agree with the others that there should absolutely be no lying. But there are tactful, kid-friendly ways to be honest without disclosing things that aren't appropriate for them. And there's probably a bit of a spectrum for what's appropriate depending on age and circumstances.
I'm also having serious concerns about the AP's potential future involvement with my kids. Though STBXW has promised that it wouldn't happen for a long time...
This is the hardest part. I have no idea what your situation is with this AP, but in my case, he was a super weird dude. Absolutely sucked, and yeah, exWW broke our agreement (at least 6 months before any new love interests were introduced to kids, and *even then* not without discussion) within about a month. She claimed she "forgot" about our agreement. She also said it didn't really count anyway, as AP was really just a "friend" and introduced to the kids as such.
Your stbxWW will likely pull the same stunts. Sorry, but you want to prepare for that.
The truth is, no matter how shitty it is, unless you can prove that AP is somehow dangerous (a sex offender or something), or unless you have some ironclad legal separation agreement with very clear rules related to this, you really have *no* say over who WW does or doesn't let around your kids. Sadly, she can do anything she wants as long as it's legally "safe."
A very shitty reality. I'm sorry. I walked the same walk. I can (and do) promise you that it gets better and you will realize over time the amount of control you *do* have, but I recognize that these are not comforting words at this point in your process. I just hope you have some trust that you are still Dad, capital D, and that will not change in any way post-separation.
It also goes without saying that this AP, whoever he is, is not likely to stick around for the long haul...but that's probably a conversation for another day.
As to your other issues, including stbxWW's shitty boundaries and the incredible amount you're going to be juggling: you're probably going to have to go into hyperdrive for a while.
It's true: you *are* the stable, good parent. So as awful as it is, you need to be the one putting in the hard work. You're going to do it for the sake of your little ones, especially because this is going to be a difficult time for them, too.
Do you have the ability to start a network of safe babysitters with driver's licenses? I'd start talking to two or three if you can (again, recognizing that COVID complicates this).
Tough spot. I get it. I'm sorry. When you can, maybe post your whole story? Could help some.
We're here with you all the way.
[This message edited by Okokok at 6:28 PM, May 17th (Sunday)]