Regina was beyond shocked to hear her father would have her mother dragged out if she didn't go willing. There has to be more to their feud than just him wanting to protect his daughter. Regina how many times have they argued about Samuel for it to reach this extent.
Rachel was just as shocked as Regina that Nathaniel would order a servant to drag her and lock her away. "Have you lost your mind? I am your wife! I deserve to be respected and not ordered to be locked away. Do you know how fast word of this will spread?"
Nathaniel ignored her words and looked at the male worker who stood unsure of if he should touch Rachel. "Why on earth are you just standing there when I have given you a clear order? Take her away from this instance or you will be fired."
'You're scaring the workers,' is what Regina wanted to tell her father but she did not want to get caught up in whatever was happening between the two. Her mother already wanted her head for telling Minnie.