Rosa has spent just enough winters in Chicago to understand that she needs to have thick clothing for the rapidly approaching cold. This is the reason that she is sitting on a bench in the park and knitting.
To her credit, it is a) still light out and b) underneath a streetlamp anyway. See, sometimes she learns from her mistakes! Sometimes.
Right now she's working on a massive ink-blue blanket, the finished portion draped over her knees.