It looks like River will turn out to be the pig boy mentioned in the title of this story. I'm still wondering who (or what) is going to be the insectorator. Of course, not really having the foggiest of an idea as to what that word is supposed to mean, it's hardly surprising I'm not sure. It could turn out to be David, since River is fixating on him. But David himself seems to be fixating on the naked boy he saw in the forest. A potential ménage à trois? Seems unlikely, but who knows where our illustrious author will take us on this ride?
I know! I'll just have to keep reading to find out how close (or far) from the mark my thoughts might be.