Yes, she was dressed up, but having just watched a few epis over again, I think she's over dressed for bed! Those were some fancy jammies, and by the end there she was sleeping alone... so my guess is she is now rich and she dresses the part, whomever it was she was meeting (altho I don't think it was Sawyer since when she gets home Jack points out that he stayed on the island; but even she admits it was Sawyer-related)