"Getting Lucky" by Dafney DeWitt (dafneydewitt@juno.com). Fuller has a foolproof plan for getting free sex from hookers in Las Vegas. He realistically fakes having a winning lottery ticket. Then he lets her ("the mark," I guess) see the winning ticket by letting her be present when he fakes the win. Then he enjoys the sex, pretends to fall asleep, and lets her steal the ticket. Only a really foolish prostitute would pass on this opportunity. What could go wrong with a perfect plan like that? OK, so what could go wrong after that went wrong? OK, so what could go wrong after that went wrong? OK....
This author's stories are invariably well written. Recently this author has posted several stories with a con game focus. This is by far the best of that series.