Strippers, street prostitutes, call girls/call boys (escorts), full service massage workers and porn workers. All mentioned are considered Sex Workers. Over ten percent of global population as done one of the above. Most likely closer to 20%. Some people work as Sex Workers for one week in their life. Some are Sex Workers their entire adult life. As soon as someone as sex for money, even once, one is a sex worker. Ninety-nine percent who work as Sex Workers for a very brief time in their life never tell their spouse. Maybe you are punishing her for her honesty?