Engaging in an extramarital affair is not illegal in the USA, as long as both parties are consenting adults. However, it can have legal implications in divorce proceedings, such as affecting alimony or child custody arrangements.
The Onion News Network - 2007 Congressman Offers Preemptive Apology for Extramarital Affair was released on: USA: 5 March 2009
The Shopping Affair - 2014 was released on: USA: 2014
An Affair - 2015 was released on: USA: 2015
The Affair - 2001 was released on: USA: 2001
The Affair - 2011 was released on: USA: 2011
The XYZ Affair of 1798 was a diplomatic dispute between the USA and France.
Love Affair - 2015 was released on: USA: 2015
The Affair - 2014 was released on: USA: 1 June 2014
France and usa
Family Affair - 1966 The Jody Affair 4-5 was released on: USA: 23 October 1969
Diary of an Affair - 2004 Millionaire Affair 4-6 was released on: USA: 22 May 2005
The Last Affair - 1976 was released on: USA: September 1976