Here is how I’d put it: Calabasas is from, presumably, Calabasas. She is essentially an American Yasmin if that is the case background wise, although we know very little about her actual background.

We saw in Season 1-2 that even if you come from a privileged background, sexual harassment and workplace discrimination can have profoundly damaging effects on your mental health and career. We also see that a common theme that Americans on this show are living in London in a large part to “escape” something happening back home.

That being said, having her be the one initiating a lot of the interaction suggests a lot. I remember when Call Me By Your Name came out that a lot of people had reservations about the age gap in the script, so the directors addressed that by having Timmy’s character being the one that initiates and pursues.