After seeing Ms Kaya Anais' two Nicholas Tanek interviews:

https://www.youtube.com/watch?v=MalYTlVlgak
https://www.youtube.com/watch?v=wyCED5gNyy4

I looked at her Tryst page:

https://tryst.link/bdsm/msskayaanais

She does extended incall sessions at:

24 hours US$3,600
Seventy Two Hours US$7,000
Five Days US$12,000
A Week US$14,000

Other than the two interviews and the tryst page I know nothing about her.




If you're willing to travel, and you're the most extreme sub ever, I'm aware of one Thai mistress who does an Ultimate Extreme month long session for roughly $8,200 USD. Having seen what it entails, I can only quote the Hobbit film:

"Can you promise that I will come back?
No. And if you do... you will not be the same!"

I won't post a link here because it's probably to extreme for the site. Again, beyond her website I know nothing about her.