When my wife and I talk in tagalog in front of the kids and we don't usually try to explain what we talked about because they seem to understand that it's grown up talk.
While in the car this afternoon, we talked about stuff regarding the birds and the bees and were kidding around. My daughter then asked us what we were talking about. I replied that it was grown up talk and she wouldn't find it interesting.
I said, "You find grown up talk boring, right?" She replied, "But when you were lauging it sounded like it was something good!" And we burst out laughing all over again.