"Wait, you have really heard of it before? What book!?" Clark's sudden outburst caused Shy to return to her disguise as a doll to the disappointment of Maria and Isa who were trying to reach out a finger to greet the little spider.
"Sorry…Shy, it's alright. I just got excited to learn more about you from a history book. We can ask Ella to share it with us and we can read it together.' Clark also saw the glare that Crim gave him when he scared Shy. It was very clear that Crim was going to be the hard core older brother here. Devi would be the more free spirited older brother. An interesting situation to say the least.
This is all part of how Clark wants to take over the city from the power that the Mourne family puts on it.