No One Knew Where He Had Gone
You can probably imagine that both Brooke and her mother were in a state of complete and utter terror, and that they were simply unable to leave the house as long as the snake was still there. Because of this, all that they could do was maintain their position of cover while they awaited the arrival of someone from Animal Control, who would hopefully be able to resolve the issue.
They did arrive within a reasonable amount of time, but there was a significant obstacle that had to be overcome before they could do so. Because the large and terrifying snake was no longer coiled around the tree, and no one knew where it had gone or how to find it again.