How do Romey and Mary Call switch roles in this chapter?

Mary Call is angry with herself for not knowing that the deal was not legal. The others can see that she is upset and ask her why she is bawling. She denies that she is crying, but she is so angry that she takes the gun from the wall to go after Kiser. Romey talks her out of doing something rash by reminding her that she said violence does not solve problems. He tells her that if she kills Kiser he will never again believe anything she says.