Why the hell would you ever use your credit card for that kind of transaction? I would never visit a prostitue, but if I did, I sure as hell wouldn't hand her my credit card.
Those who pay for her services see a record of purchasing a consulting service on their credit card. Though this seems clever, she will technically have PII data on all of her customers if she is somehow caught in the future, but the chances of someone like her being caught may be smaller than most.