Background: Fibber McGee and Molly was an American radio comedy series. A staple of the NBC Red Network for the show's entire run and one of the most popular and enduring radio series of its time, the prime time situation comedy ran as a standalone series from 1935 to 1956, then continued as a short-form series as part of the weekend Monitor from 1957 to 1959. The title characters were created and portrayed by Jim and Marian Jordan, a real-life husband and wife team that had been working in radio since the 1920s. Fibber McGee and Molly, which followed up the Jordans' previous radio sitcom Smackout, followed the adventures of a working-class couple, the habitual storyteller Fibber McGee and his sometimes terse but always loving wife
Context: Fibber McGee and Molly spun two supporting characters off into their own shows. By far the most successful and popular was Harold Peary's Gildersleeve, spun into The Great Gildersleeve in 1941. This show introduced single parenthood of a sort to creative broadcasting: the pompous, previously married Gildersleeve now moved to Summerfield, became single (although the missing wife was never explained), and raised his orphaned, spirited niece and nephew, while dividing his time between running his manufacturing business and (eventually) becoming the town water commissioner. In one episode, the McGees arrived in Summerfield for a visit with their old neighbor with hilarious results: McGee inadvertently learns Gildersleeve is engaged, and he practically needs to be chloroformed to perpetuate the secret a little longer.  Peary returned the favor in a memorable 1944 Fibber McGee & Molly episode in which neither of the title characters appeared: Jim Jordan was recovering from a bout of pneumonia (this would be written into the show the following week, when the Jordans returned), and the story line involved Gildersleeve and nephew Leroy hoping to visit the McGees at home during a train layover in Wistful Vista, but finding Fibber and Molly not at home. At the end of the episode, Gildersleeve discovers the couple had left in a hurry that morning when they received Gildy's letter saying he would be stopping over in Wistful Vista.  Marlin Hurt's Beulah was also spun off, leading to both a radio and television show that would eventually star Hattie McDaniel and Ethel Waters.  Jim and Marian Jordan themselves occasionally appeared on other programs, away from their Fibber and Molly characters. One memorable episode of Suspense ("Backseat Driver", 02-03-1949) cast the Jordans as victims of a car-jacking; Jim Jordan's tense, interior monologues were especially dramatic.
Question: Why was this significant?

Answer:
became single (although the missing wife was never explained), and raised his orphaned, spirited niece and nephew, while dividing his time