"Pathetic! With the whole wide world of ear-related humor before you, you go for holey?"
"Ah well," said George, grinning at his tear-soaked mother. "You'll be able to tell us apart now, anyway, Mum."
He looked around.
"Hi, Harry – you are Harry, right?"
"Yeah, I am," said Harry, moving closer to the sofa.
"Well, at least we got you back okay," said George. "Why aren't Ron and Bill huddled round my sickbed?"
"They're not back yet, George," said Mrs. Weasley. George's grin faded. Harry glanced at Ginny and motioned to her to accompany him back outside.
~Harry Potter and the Deathly Hallows: page 75
Disclaimer: J.K. Rowling owns the Harry Potter series and all the characters, while I, sadly, own nothing.
Mrs. Weasley fussed over the twins.
"I'm fine, Mum. Honestly," George said getting annoyed. "I think Hagrid might need another bottle though."
Glancing at Hagrid through the doorway to the kitchen, she said, "If you're sure you feel fine. Call if your head starts to hurt, even if it's only slightly" Fred turned to George as she retreated back into the kitchen.
"Are we going to tell her?" he asked. "How mad do you think she will be?"
"Mum will start screeching like a banshee, when we tell her." 'George' sighed back. "She will be all – YOU TWO AND YOUR JOKES! FRED COULD HAVE BEEN KILLED BY THAT CURSE, AND YOU THINK NOW IS THE TIME FOR SWITCHING NAMES?" he mimicked Mrs. Weasley's howler voice perfectly in an undertone.
"We did it to mess with Moody though."
"You think she will care." 'George', who was really Fred, replied.
"Let's not tell her right away," suggested 'Fred', who was really George. "We should wait till Bill, Fleur, Mad-eye and Mundungus get back."
The twins sat in a rare moment of silence before Fred smiled. "You know what this means don't you? They still have our names mixed up. Which means that, even if we tell them the truth,-"
"-they will only think we are playing a joke on them, but it really is the truth! Yes! We are genius," the twins laughed, almost missing the lookouts coming back inside.
They never did get the chance to inform Mrs. Weasley of their switch. At first, they stayed silent because it was disrespectful to laugh about it in the face of Mad-eye's death and Mungungus's betrayal. Then, they resolved to tell her after the wedding. She was already yelling at them about decorations, and they didn't want any more lectures. However, as usual, things that involved Harry Potter, no matter how small his involvement was, never went to plan. The Death eaters didn't even have the decency to wait until after the reception was finished. In the end, Ron, Harry and Hermione were missing, and the Weasley's had been tortured. The twins ran off with their long-time friend, Lee Jordan, to start an underground radio station.
Anything they had to say could wait until after the War.