Fred didn't try any tricks at the door this time, just apparated with the basket of scones and muffins his mum had sent (or he'd nicked from the Burrow, whichever) and knocked at the door after he walked up to her flat.
He felt guilty, and also didn't. It wasn't like telling his friends had been an option, but when Remus had asked to use the shop he'd done what he could to make sure everyone who should have been was on his list.
"It's me!" He called out, knowing his voice would carry.