There is no question, why the women in the firm keep Erin at arms length and do nothing to help acclimate her to the office environment. They are fully aware of the power a woman has when she is attractive and bold. They feel threaten and hide their feelings with shared disapproving glares and whispers. Erin has dealt with situations like this before, so her defenses are up. These women have skills and dress appropriately, yet an inexperience woman with big breasts is still intimidating to them.
People tend to approve and welcome an asexual, smart woman.
However, that doesn't apply to attractive and smart women. Women for centuries have used their sexuality and brains to influence the men in their lives particularly in patriarchal societies where the social codes for women were repressive and inhibiting. It was the only power left to them. However, men control even that power to some extent. Women are still divided into two categories, the whore and the Madonna.