I should have whispered that

Ok. So here's the plot of what I think.

So Dudley is up in a tree. He didn't see Kitty under the tree.
"Kitty! I love you!" Dudley yelled.
"What did you say, Dudley?"
"N-Nothing!"

So yea. He covered his mouth once Kitty heard him. Don't alway yell things out. You could never know who's gonna hear it