You will help your children get through this. They will be okay. Not one of us here wanted this for our kids lives. Every one of us that has kids felt our heart break more for our kids than for ourselves. You are their advocate and protector through this. Put on the face and be strong, but also be honest with them about the changes in their lives. In an age appropiate way. Not placing blame or giving details, just honest about the changes in their lives. That is what I have found works the best.
And yes, I have let my son see my emotions a couple of times. We have cried together a couple of times. Everybody is human. But I try the vast majority of time to keep my strong brave face on. That's what we have to do to shield our kids. It's not "lying" it's showing them strength in the face of adversity. I recommend being honest when they ask u questions though b/c that will help ease their fears. Of course in a gentle age appropiate way.
"Success is the sum of small efforts, repeated day in and day out." Robert Collier
"One's best success often comes after their greatest disappointments." Henry Ward Beecher