Build up
Once the rest of the Weasleys and McGonnagal were in Dumbledore’s office, Dumbledore sent Fawkes to give the news to Molly. They (the kids) used floo powder to get to Grimmauld Place. Sirius wasn’t surprised by the sudden arrival. Dumbledore had sent Phineas through the painting in his office to the other one at Sirius’s house.
Sirius gave the kids hot chocolate to try to rise their spirits and convince them Arthur would be fine, physically at least. When the others at the ministry noticed, they’d take him to St. Mungo’s. Sirius was having a hard time being “the adult in charge”, usually he was being supervised (read: babysat) by Moony, Molly, or anyone that was deemed mature.
Harry wanted to tell Sirius about his dream of the snake, but he knew he’d have to wait until they knew that Mr. Weasley was alright. No point in depressing the whole room.
Soon, Molly came in through the fireplace. She asked them if they had any idea on her husband’s condition. Unfortunately, everyone was still in the dark.
The headmaster later sent a message (with Fawkes) that Mr. Weasley was fine. He’d sent one of the paintings in his office to the ministry to alert the wizards there. Someone had found the body and rushed it to the hospital. A wave of relief went through the room.
Mrs. Weasley told the kids to go to bed and that they’d visit St. Mungo’s the next day. No one actually slept but it was still pin drop silence.
The next day, they all went to the hospital and visited Mr. Weasley. He was completely fine except for a few scars. All the worry was gone. All was well.
The second they got back however, they heard a bunch of screams and a loud thud. A voice only familiar to the trio and Ginny said “Seriously?!”
“Percy?” asked Harry. What in Merlin’s beard were they doing there? The Fidelius Charm was supposed to stop anyone who wasn’t told the exact location by the Secret Keeper (in this case, Dumbledore).
“Yes, it’s me, little help here?”
Harry walked into the drawing room and was met with eleven people who looked like they’d just been through a double loop the loop rollercoaster, in other words: dizzy and disoriented. Half of them were on the floor or on top of each other.
“Hecate,” Percy said, rubbing his head, which had hit a table corner in his haste to get up. “She said it’s time to tell everyone and before you ask, yes, she did teleport us here. Also you’re most definitely the prophecy kid. Sorry dude.”