C# Testing Lines of Code Covered Using Ruby/Cucumber Testing Framework

I have recently taken over a team that uses Ruby with Cucumber for BDD style integration and UI tests. My unit's Chief Executive Officer (who does not have a software background) wants to see KPIs for testing coverage... specifically lines of code covered, etc. that you would normally see when using a unit testing framework such as NUnit or XUnit. With BDD, you generally don't have these types of metrics... or am I wrong? If there is someone out there that knows how to get lines of code covered metrics from a BDD style framework like Ruby/Cucumber, your thoughts would be appreciated!