The older sister takes on the lion's share of raising her brother. I have seen them board a bus and go to the mall to buy the little boy clothes. I have seen her bathe him, put him to bed, make him lunch, and clean his room. Seven is way too young to have to care for her brother in that manner. And the brother once went in to town with his little red wagon several times completely alone. He went to the grocery store under his sister's instructions, and did seem capable of getting the items requested and he did report straight home... but come on. Going to a store alone at what must be 6 years old? Just not right.
Occasionally their grandmother stops by, but even that is weird. They seem to work for her, almost. They serve her tea, they put on shows for her. There has to be some sort of child labor law violation here. The grandmother does bring them treats once in awhile, but still. They typically have to provide things for her.
Several of you must know these kids as well, so I just wanted to voice my concern and see if anyone else shares it. If you see them around, keep an eye out. Its pretty clear the parents aren't.