Well being a parent myself and 2 of my children still live at home, if one of them didn't come home or make contact with me for a day, there would be an issue. However I do have a son out of high school, and if he and his gf got in an argument and he didn't speak with her, I wouldn't necessarily be concerned about that.
I get your point, Hunter should have checked on Christina, and I know for a fact, he knows that as well. She doesn't live with her parents, it was a holiday weekend, Jonni knew that Christina had plans that weekend. It wasn't a spur of the moment trip to Plano or to PP apartment. I also have a daughter that is grown, married, and has a child of her own. I talk to her several times a week, but if she had plans to be gone and didn't call me for a few days I wouldn't panic over it. She does that. She's grown and has a life of her own. But that is just me and JMO