J.:
I was faced with this situation in the past. Everyone is different and each situation is different, but I will tell you a little of how I handled it in hopes that it might help you. First, I sat them down and explained to them that it was just going to be us. I did this by myself because their dad was too emotional and I wanted it to be less traumatic (as possible, that is). I let them ask questions and of course they asked why......My answer was this, "I will always tell you the truth. I will never lie to you. But, if you ask me a question that I don't think you need the answer to, then I will tell you that that is simply not something we need to discuss." I got asked why many times and I was always tender with my response and explained that it's just Mommy Daddy stuff and it doesn't mean that either of us are mad at either of you....none of this is your fault.
Ok - I also had what I called "truce talks." My daughter (the oldest and awas just slightly younger than your oldest is now) would get VERY angry sometimes. And, I could tell she had things on her mind. When she got this way, I would sit her down and tell her "truce talk" .... We had defined a truce talk as her being allowed to say whatever was on her mind however she needed to say it without my getting angry or her getting punished. This was VERY helpful in her dealing with it because she didn't have to be afraid of telling me how she feels. Remember -- feelings are feelings -- there is no right or wrong in how a person feels .... the best you can do is try to get them to understand the situation in another way.
And, we did counseling. And, this helped TREMENDOUSLY as well.
I think by the fact that I made my main focus about protecting my children and helping them be "ok", I circumvented so much of the troubles that a lot of divorcing parents go through. My ex-mother-in-law has even told me many times that she is so impressed by how adjusted the children are. Putting them first while they adjust makes a difference and will make your life easier. Later you can transition to having "mommy-time" and stuff like that.
I wish you all the best. ALL the best. And, if you need any advice, believe me when I say I have lots of advice to help you avoid financial pitfalls later. Remember, just because your divorce decree states that the other person is responsible for a "joint" debt, doesn't release you from the responsibility if they default. We are going through this right now with my new husband's ex-wife.....she told my husband that she removed his name from a credit card but didn't....then ran that card alone to over $22,000 (along with a couple other small ones) and then went to a debt consolidation company where they default on everything (including the car loan) to make the creditors work with them. We now have over $50,000 worth of defaulted debt on my husbands credit and his score dropped from 814 to 644. Protect yourself from damage that could be caused to you later.....they were divorced over three years ago and this all happened last summer.