To stay current the content needs to get more and more outrageous. Lily could very well go back to OF vanilla style and still earn a lot, but she’s feeding off the notoriety and money now. That’s her motivation, at any risk.
There are 35 STIs to be contracted in the porn industry. Although other pornstars are typically tested every 2 weeks, what about the 100 fellas that Lily slept with a month ago, any 100% guarantees they were STI free? Particularly the last lot who were grabbed off the street?