[cstreit]

While I agree with others that it's a little paranoid to assume that the invitation is untoward, doesn't it strike anyone as a little odd that she didn't give a reason for the coffee meet?

When you haven't seen someone in quite a while would you:

a) Say HEY, lets go out for coffee?
b) Say HEY, can I buy you a cup of coffee and talk about some job propsects/spreadsheets, etc...

So because of that, I have to conclude that the aforementioned manipulation of said body parts might be a distinct possiblity because if it was a professional situation social convention says that you should give a reason or objective for the meeting rather than just "Lets go". I'd invite along a co-worker. If it's professional it won't be a big deal, if it's "other" than you will have sent the message "Not interested".