According to dating site Ashley Madison, an online service that connects people who are already in relationships looking for affairs, these are the cities where they have the most cheating clients.
Orlando, the home of Walt Disney World Resort and Sea World, landed on our list of top 10 cities with the most relationship cheaters.
9. Dallas, Texas
Dallas, the third largest city in Texas and ninth largest in all of the United States, is number nine. With its strong industrial and financial sector, this city is the home of many millionaires.
8. Chicago, Ill.
The most populous city in the Midwest, Chicago has nearly 2.7 million residents - some of which are cheaters. It's number eight on our list with the "biggest age gap between men and women" when it comes to clients, says Ashley Madison.
7. Boston, Mass.
Interestingly enough, Boston (which is seven on our list of cheating cities) has more sign-ups during Major League Baseball's off season, according to Ashley Madison.
6. Pittsburgh, Pa.
By the same token, sign-ups for Pittsburgh go up during National Football League's off season, too, says Ashley Madison. Hmmm.
5. Oklahoma City, Okla.
Oklahoma City, which is the 31st most populous city in the United States, also made the cut on our list of cheating cities.
4. Salt Lake City, Utah
Founded by Brigham Young and his Mormon followers, some might be surprised to see Salt Lake City on our list of cheating cities.
3. Phoenix, Ariz.
Phoenix, the sixth most populated city in the United States and home to seven Fortune 500 companies, is number three on our list.
2. San Antonio, Texas
San Antonio is the second on Ashley Madison's list of cheating cities, and the fastest growing at that. San Antonio's economy focuses on financial services, government, health care and tourism.
1. Portland, Maine
Portland is the largest city in the state of Maine and the number-one cheating city, according to Ashley Madison. The city also hosts many renowned bars, taverns and restaurants - prime ground for daters of all types.