Threads are considered a luxury, especially if they are not the traditional thread made from linen, wool, and cotton. Elaina has materials for making threads, but she doesn't have the tools that would be capable of turning them into one. Which is why, if the spider is capable of creating synthetic silk without the need for tools to convert materials into threads, then she would be very happy to have a spider like this on the farm.
Although excited over the prospects that the spider can bring to them, Elaina quickly adapts her serious and transactional face as a way to make herself convincing. It is the first step of what she always does when doing transactions or making a business proposal.
