Of course from Rep. King’s biography on his House web page:
Steve King grew up in a law enforcement family in Storm Lake, Iowa. He attended Denison Community High School, where he met Marilyn Kelly, whom he married in 1972. They have lived in Kiron for 38 years and are members of St. Martin’s Church in Odebolt. Steve and Marilyn have three grown sons and·five grandchildren.
I guess it’s fine for him to tell other people about his sexual orientation, just not the other way round.