White Silk Scarf
After watching the movie, it dawned on me - how would Beth afford a Hermes scarf? She is a therapist that would bring in a large income, but I seriously doubt she could afford one THAT expensive. She could have stolen it from Catherine, but Catherine never mentions that her scarf was stolen (ok, she never admits to having a scarf, but she's 'always had a fondness for white silk scarves'). Throughout the movie, it is emphasized again and again how rich Catherine is, but Beth lives in an apartment of modest means.
Just saying...