These guys may be worth a call: Cordell and Cordell
http://www.cordellcordell.com They specialize in representing men in divorce proceedings. Austin did a good job of outlining CO state law for you and if you lawyer hasn't done this it's further evidence you need to get a second opinion. Don't let the surprise of this leave you walking blindly through the divorce and financially screwed in the end. You worked hard for what you have and this is not your fault. Fight for what you've earned so you don't have to do it all over again. Good luck!