VIDEO : Kaitlin Olson Says Her Six-Year-Old Son Is ?Definitely A Psychopath?

As many are aware, It's Always Sunny In Philadelphia co-stars Kaitlin Olson and Rob McElhenney have been married since 2008, and the couple now have two children together, six-year-old Axel and four-year-old Leo.
Olson, who also stars on 'The Mick', appeared on Conan on Monday night, and said that now that their boys have now reached an age that they like to work together, against her, and recalled a particularly disturbing incident recently when husband McElhenney was out of town.