Further to Scutty's post:
In 2010, HMRC, introduced a new data analytics platform, called "Conect". It links to a huge number of data sets. Nothing much changed for some years. But now they are deploying AI, while at the same time, compelling every firm from eBay to crypto exchanges to send transactional data to HMRC.
Banks are now sending massive amounts of data on customers accounts (including credit card accounts). For the first time HMRC are able to match spending and income on a scale that they couldn't before.
The new "Making Tax Digital" quarterly online returns for firms turning over more than £50k (using HMRC recognised software) is now in force and is feed ing into the analytics platform.
Already, there has been a massive increase in the number of "Nudge" letters HMRC are sending out.
The bottom line, is that OP will be getting involved with Chinese prostitution (beyond being a punter). You can bet if he continues to see her, he will be called upon again. And how long will it be before her friends want to use OP's services.
If it was me, I'd have dropped her like a stone the moment she wanted more than just cash in excange for sex.