How do lord and lady capulet show themselves to be emotional people in act three

Lord and Lady Capulet both have strong emotional reactions to Juliet's refusal to marry Parris. When Juliet gives her answer, Lord Capulet gives her an ultimatum: marry Parris or he'll disown her. Lord Capulet does not have a rational conversation or hear Juliet's concerns. Lady Capulet also reacts emotionally when she refuses to listen to her daughter as well.