Okay kiddo, have you ever played a game with cards, like Go Fish or Uno? Well, sometimes grown-ups can play a game with cards but they don't play fair. That's called an affair of the cards.
You see, when you play a game with cards, everyone agrees on the rules. But when someone cheats and doesn't follow the rules, that's not fair. It's like playing Hide and Seek but someone decides to hide in a spot that's off-limits. It's not playing fair and it's not fun.
Sometimes when grown-ups play card games, they might try to cheat by looking at the cards before they're supposed to, or maybe they'll try to switch the cards with different ones. This is called cheating, and it's not okay.
An affair of the cards is when someone cheats at a game with cards. It's not fair, and it can make others feel sad or mad. That's why it's important to always play by the rules and be honest when playing games with others. It's much more fun that way, and everyone can have a good time.