Sophie Chandauka's track record is very impressive. This has made me ponder whether there's actually a less obvious element of jealousy at play here.
You position yourself as being a high flyer, and whilst your achievements are real maybe you've made them sound a bit more impressive than they are. And that's fine, except one day you meet someone who has not only done the things you've done, but better, bigger, and a whole lot more besides. The icing on the cake being that they have done all this despite having faced prejudice and discrimination - and it's obvious that they have probably faced this much more overtly than you have.
If you've been doing the social equivalent of padding your CV, it would be easy to feel jealous of the other person, because they don't need to exaggerate. They are a talented high achiever and therefore they have something that you don't have, but that you wish you did. And that's not a feeling that you are familiar with - because you usually get what you want.
In the real world, most of us that have an attack of the green-eyed monster, have friends and family to talk some sense into us. But if you are cocooned in a marshmallowy world of yes-people and sycophants, it must be very jarring to suddenly be confronted with someone who makes it clear that they are not intimidated by you, neither will they fawn over you, and they certainly won't kowtow to you.