I just thought I'd come on and tell you that I'm really sorry for what you're going through right now. You don't deserve any of this. I wish there were more words of encouragement I could offer you. For what it's worth though, I too think you're doing the right thing. I know that won't stop it hurting but I truly believe that once this hurdle is past you will start to improve within yourself even more.
I myself was in a very similar situation to your kids when I was 10 years old. My dad was having an affair and broke up with my mum. The first thing I knew about it was when my dad took me, my brother and my sister for a drive in the car one day. He took us to this house we'd never been to before and went inside. Surprisingly, it was my mum who was in the house. I thought at the time it was a surprise and we were all moving. It was only when I asked about who was sleeping where that they told us that mum and dad's room was only going to be mum's room. I took it very badly if I'm honest but not for long. I soon bounced back and became myself once again. My mum was a tower of strength through everything just as I know you will be for your kids. I never hated my dad for what he did but I never got on well with the OW (she's now my step-mum). At the end of the day, he was still my dad and I loved him. I know you feel horrible about what's happening PM but your kids will get over it and lead a normal life. The scary thing is that separation and divorce is normal for kids these days. I hope it helps you to hear this and to know that my brother, my sister and I all went on to do well in life and find fantastic careers.
I hope you find yourself again and learn to smile once more.
Kev X
Me: 32, Wife: 22 Son: 2 Married: 2 years Separated: January 5th 2009
Sometimes you have to become lost before you can find yourself.