Atticus made threats to his children all the time and never punished them. Atticus told Jem "I don’t want to hear of poker in any form again. Go by Dill’s and get your pants, Jem. Settle it yourselves."
Jem went back for his pants so Atticus didn't know he purposely disobeyed him. This shows that Jem is acting mature by going back for his pants and not disappointing his father.
Scout said “Mr. Nathan’s gonna find ‘em in the morning, Jem. He knows you lost ’em. When he shows ‘em to Atticus it’ll be pretty bad, that’s all there is to it. Go’n back to bed.” “That’s what I know,” said Jem. “That’s why I’m goin‘ after ’em.” This proves Jem didn't want his relationship with Atticus to change.