It's not the SAT scores, it's the accusation that he paid someone to take his SAT for him. Which she wouldn't know because she could not possibly have witnessed that.
UNLESS an Orange Turd was unable to keep a secret?
Maybe the whole family knows that little anecdote?
Maybe he even got his kids' report cards and told them, "Doesn't matter, when the time comes we'll get some smart Jew to take your SATs. Mine cost $150."