My interpretation is that she felt the low cut dress comment was derogatory (like the term slut), and that the man, by sitting across from her in order to sexualize her, thought he was doing what she (the slut) wanted ("why else do women dress nice?"). If she weren't a slut, then her dress would be a dress, and there would be no reason to call attention to it, especially not in that way.

The guy doesn't want her to wrap herself in sweaters only because he wants to continue to objectify her, not because he sees her as a person that has the right to dress comfortably (as long as it's still appropriate).

What's empowering about being a sexual object if you want to be a programmer?