It is of my oppinion that a fully competant pilot will rise above any distraction and keep his main goal (flying the plane) at hand. Therefore any distraction will (hopefully) be purely based on a disturbance to the flight deck which the pilot can react to and correct, be it a slight bump of turbulence or a big bright noisey alarm!
So long as your family is briefed on the dangers of human factors, I see no problem with catering them around.