Just Divorced

I'd been married since both 17 and at 31 we divorced, she got the 2 children, and I paid alimony and child support. Shortly after the divorce was final my ex-wife's best friend 30 came to see me and wanted to start a relationship with me. I was reluctant at first as I didn't want to make waves as they say with my ex-wife. So, I asked her would it be okay for me to date her best friend, she said go for it. So, I started dating her friend and we quickly became lovers. My ex-wife was still okay with my new relationship, but things became a little tricky last Christmas. I took my new girlfriend, my children and ex-wife away for a ski holiday. The children in their beds asleep us adults partied a little too much, I awoke next morning in bed with both my girlfriend and my ex-wife all naked. After my mind cleared up and I remembered the night before, we'd a threesome and got intense. After we all were with it as they say, it dawned on my ex-wife she wasn't protected, and I hadn't taken any precautions either. To add to the situation my girlfriend also was protected and neither had I taken any precautions. Outcome both got pregnant and after we thought it thru, it was decided I marry my girlfriend (ex-wife's best friend) and my ex-wife would move back in with me and my new wife. We would all live together as a family, my ex-wife hadn't changed her surname back to her maiden name. So, both would have my surname after I married my girlfriend. I now have 4 children with my wives you could say. The 2 oldest were the boys I'd before the divorced and now a daughter with my ex-wife and another boy with my new wife. So far, no problems with our arrangement.