how does Jane know... | Dickinson 1x3 'Wild nights' First Reaction (Patreon)

I really enjoyed this episode! that party looked like so much fun! especially the dance scene at the end! omg, I'm so curious what Austin is going to say or do after what he saw and how does Jane know so much. I want to know more about how much Emily/sue/Jane are in close proximity for her to be able to watch them 🤔