If they are cradle Catholic’s why don’t they goto Church?There is a underlying reason have you ask them about that?We have been going to mass every Sunday for 45years(but missed today,cause of a snowstorm 12″ of snow this morning),When did they stop going?I don’t know how far you live from them but have you ever thought of calling them the night before and said “About going to mass I will pick you up”Just a idea.You and your family are in my prayers.