David Weatherly
Black Belt
From what I understand, this is a family martial art that you're passing on to your sons. That's cool and all, I commend you for that, but here's the thing.
You should make them swear to a code to NEVER tell anyone about the martial art, its origins, or the kind of techniques they do. They should swear NEVER to use the techniques, or go into some kind of sparring match hoping to demonstrate their techniques.
I'm not questioning your credibility as a martial artist, or your ability to teach, I'm sure you're quite proficient, but putting a big mac in a burger king box doesn't make it a whopper.
Excellent advice.