Helena never used to flinch. These days I suspect she mostly pretends to be scared of them because you're supposed to be scared of them. And it turns out spiders aren't scary at all if you know exactly where they are. At all times.
Hence Helena's desire to confine our recent arachnid visitor — who lurks in one bathroom corner one day, another the next — to a particular location.
The plans I found end there, and have not yet been continued. But these notes begin to explain the shoebox she's been carrying around.