I love these sorts of very detailed panels. It can tell you a lot with absolutely no dialogue or even further context.
Girl in forefront seems to have engagement ring on her left hand (you can just barely see it in the mirror). She seems confident from her back, but actually blushing, little bit insecure and maidenly in the mirror.
The other woman seems to be calling her to come and talk with her. She's striking slightly provocative pose, angling and displaying her beautiful leg suggestively. I can kind of feel her rate of movement and mannerisms just from this still image. Like slowly pulling out her purse and pretending to be searching for a cigarette lighter, so the other woman would come and offer her some light.