Is she my sister or what?——2

With that, he stood up from the chair while the first madam opened her mouth and then said sternly, " Sit back down, Ah Xun. You might be the heir but you are not the duke yet, you have to listen to your father!" 

The first madam was finally a bit more at ease after she realised that she could deal with the three sons of her husband without doing the dirty work. As long as they were married to a girl who can be controlled, she will have a much better chance of putting her daughter on the pedestal of becoming the heir instead of these three men.