I didnt have jealousy issues with N and C (or even N and L), but with C (just about 2yrs old at the time) and L I sort of did. I still remember L was a few weeks old and wrapped in a blanket and had a blanket laying over her, C walked up and took the blanket from L and it has been her "blankie" since and there were no jealousy issues. They fight and bicker like normal sisters do, but no jealousy issues.
I know that doesnt help but i thought id share. :grouphug: