I think you pretty much nailed the order. A couple of minor corrections from the opening scene, though (SPOILERS) - the unnamed son is definitely awake during his death. Just before Art starts swinging, we hear him tell his sister to get out as he thinks it's her coming back into his room. Also, aren't his and his dad's deaths the first and second (not second and third)? And, the unnamed mom is actually named Jen (we hear her husband call her that). Sorry for the nitpicking, but excellent article!