My girlfriend's family underwent an economic inquiry

Last week, families got together to meet. Everything was going quite well, but then my uncle suddenly asked my fiancée's father, 'What do you do for a living? Is everything good there?' At that moment, everyone froze, but I tried to change the subject. My fiancée didn’t react much but later pulled me aside and asked why I did that. I was very embarrassed. What do you think I should do now?