"I'm so sorry about my parents' behavior." Anna feels ashamed that Kyle has to see her parents arguing like that.
Kyle is the guest of their manor, and she has been thought that no matter who it is as long as it's the guest of the Colemans, she should behave accordingly. And yet her mother and father did the exact opposite of what she expecting them to act.
"It's alright, and honestly, my parents are like that too." It might not seem too obvious, but Kyle's parents do argue the same way from time to time. By now, he is used to it, so he does not mind seeing Anna's parents' other personalities.
In fact, he is happy to learn more about his girlfriend's parents. The more he learns about her family, the more he felt like he is a part of their family too.