not Cathe here.
Have had a similar problem, due to so much time just sitting in a chair at work, various muscle pulls, my not stretching enough, etc. Recently discovered an exercise program by a martial artist named Paul Zaichik. The program is aimed at martial artists trying to improve their kicking skills and also at persons wanting to do front and side splits. It is called "Elastic Steel." If you google his name and Elastic Steel, you will find his web site. I have been doing it off and on for a couple of months and it is helping me. By no means is it a substitute for Cathe's cardio or weight work. Her cardio/weight work should remain the meat and potatoes of your work outs, but it is a good supplement for a specific problem. So for example, I do Cathe's Kick Punch and Crunch, and then at the end do 10 minutes of Elastic Steel stetching/conditioning for the inner/outer thigh because that program is geared directly to my problem area.
Good luck.