Many of the so called career women (expecially the hot ones) fake being friendly and nice with people while all they want is someone who will be useful for their career. And when they see you can't or don't want to help them anymore, at best they totally ignore you and go on manipulating other people, at worst they spread malicious gossip and try to isolate you.

I was manipulated during high school by a girl who totally ignored and despised me until she saw I could have been useful to her. Then she started acting super nice to me, of course for as long as she could use me to get higher grades.

Whenever someone is trying to get your attention with her looks and being superficially nice / charming, it's a sucker trap, don't fall for it guys.