Wilbur was wandering around the forest with his two brothers, Techno and Tommy. Techno was the oldest (12), Wilbur was the middle (9) and Tommy was the youngest (5). Their mother died when Tommy was a baby and their father ran away from them so they had to live by themselves, the house wasn't paid since the dad couldn't care less about the children so they had to go out of the house and find somewhere else

you heard them coming and hid your horns under a cat beanie and tucked your tail into the shorts of your overalls, making yourself look more human-like aside from a scar that was from your nose to your forehead

they see your treehouse and Techno points up at it, assuming it's abandoned because he can't see anyone when you silently walked next to them