Mary married Terry Peters, a marine, at age 17. She and Terry have three children together.[3] In 2013, Terry was convicted of sexually abusing a seven-year-old girl, and he was sentenced to fourteen years in prison.[14][15]

14 - Porter, Tom (September 21, 2013). "Terry Peters, Husband of Ex-US Transport Secretary Mary Peters, Jailed for Sexually Abusing Girl". International Business Times UK. Retrieved May 12, 2008.

15 - The Associated Press (September 21, 2013). "Husband of former U.S. transportation secretary sentenced to 14 years for sexually abusing 7-year-old girl - NY Daily News". nydailynews.com. Retrieved May 11, 2018.