Child flashes Illuminati hand signs at parents when dropped off at school??

My husband was dropping my son off at school before the last school year ended. He came home and said, "you are never going to believe what I saw." He said when he dropped my son off, there was a car in front of him. The car belonged to a boys parents who lived down the road from us. They live in a HUGE house. My husband said he looked to be about 5. When the boy got out of the car, he walked up onto the curb then turned facing his parents who were still in the car. He then stood up straight like a soldier and flashed two illuminati hand signs to his parents. The parents nodded and then the boy walked away and went to class. The signs were the devil horn sign in straight formation and the triangle sign made with both hands. Can anyone tell me if this is just standard for freemason famililes or what?