what was mr. and mrs. wilsons relationshi like? How did myrtle know she made a mysake when she married wilson?

Myrtle shares a loveless marriage with George Wilson, a man who runs a shabby garage. She has been having a long-term affair with Tom Buchanan, and is very jealous of his wife, Daisy. After a fight with her husband, she runs out into the street and is hit and killed by Gatsby's car. In Chapter 2, Myrtle laments marrying George,

"I married him because I thought he was a gentleman," she said finally. "I thought he knew something about breeding, but he wasn't fit to lick my shoe."