Sibling Stories, update:
The house remained empty, untouched for well over a year. I think we thought that they were coming back, but they never did. One day, when we got home from school, the yard was being mowed, and the house cleaned up. They eventually sold it--After repairing the siding, removing the oranges from inside the walls, and replacing the potato-ey ac unit. Of course.
So, what happened to them? I really don't know. I vaguely remember hearing a rumor that they fled to Mexico, but I don't recall why. I'll have to see if my brother remembers.