So seems like you're safe in the Airbnb?
As long as you didn't go down to the basement and through the cave door, or outside at night. Both Keith and the girl were left unharmed through their first night and so was Justin Long's character, who must have stayed there other times I imagine, since he owns it, presumably all while the woman creature has been coming upstairs and out of the house at night. The trouble only started for them once they started investigating in the tunnels.
Any particular reason the woman creature didn't just attack them on the first night if they are right there and she is going out to hunt anyway?