Gents,

I know this is probably unnecessary over analysis but I'd like to hear the thoughts of people more versed in body language than myself.

A little background.
The receptionist at work is probably an 8 on a bad day. (I know. Don't shit where you eat. I don't plan to. This is all just for information, not execution.) We have a fairly flirty relationship. I often stand by her desk chatting. And she does the same. Nothing overt, but lots of teasing etc.

Question: I've noticed that she has recently started to wear tighter, lower cut clothes, make these over the top facial expressions when she's reading emails in front of me (as in, faux shock at whatever the person has said) and playing with her hair. I know playing with her hair is a little IOI and the clothes are likely just because the weather is getting warmer, but what about the exaggerated facial expressions?

Feel free to tell me I'm over analysing but this is all new to me and any advice on noticing subtle cues I can get will be an enormous help.