You were Rosalind Potter, you were Harry's older sister, you were the bestfriend of the Weasley Twins since first year.
You, your brother, the Weasley, Sirius and Remus were at Grimmauld place, all the adults were downstairs, talking about the Order while you, Fred, George, Ron, Harry and Hermione were upstairs in your room.
You were all sitting in a circle on the floor and doing jokes, you were sitting next to Fred.
"Knock knock." Harry said to Ron, preparing another joke.
"Who's there?" Ron asked, already having a grin on his face as Hermione hold his hand.
"Nana." Harry continued and Ron hold back a laugh and the other snickers.
"Nana who?" Ron asked, holding Hermione's hand.
"Nana your business." Harry said and everyone laugh and Fred and George hold their knees.
"Ok.. ok.. knock knock." Ron said to Harry, preparing the joke.
"Who's there?" Harry said as you and Fred look at eachother.
"Woo." Ron said, hiding a smile.
"Woo who?" Harry asked, grinning.
"That's the sound of the police." Ron finished and you all laugh.
"Knock knock." Fred asked George, adding another joke.
"Who's there?" George asked Fred, grinning.
"You." Fred said, already chuckling.
"You who?" George asked and everyone look and snicker.
"Youhou!"
Fred exclaimed and everyone laugh, George was almost holding his stomach and Ron was squeezing Hermione's hand.
"Knock knock." George asked you and you grin.
"Who's there?" You asked, preparing yourself for another joke and George laughed silently, before saying.
"Auch." George said and smirk.
"Auch who?" You said, your voice cracking from holding back your laugh.
"Bless you!" George finished the joke and every single one of you burst into laughter, Hermione holding into Ron, Harry holding his knees, Fred leaning against the bed as he sat on the floor with you all and laugh.