"There were bars on his window Mum!"
"I'm sure they were just to protect him. Now Harry dear, sit down and I'll get you some breakfast".
"They were on the outside! To prevent him from escaping. They were keeping him prisoner!" Fred shouted.
Molly went very pale. "What did you say?"
"His bedroom door had locks on the outside too."
"Is this true Harry?" she asked gently.
"Embarrassed, Harry just stared at his plate.
"Harry?"
"Yes Mrs Weasley" he mumbled.
Molly stood up, a steely glint in her eye. "Percy, keep an eye on things. Fred, George, take Harry's trunk up to Ron's room. Ron, Ginny, set up one of the camp beds for him." When she had that look they all knew that they'd better obey instantly or else.
"Where are you going Mum?" Asked Percy.
"To give them a piece of my mind." She then turned to Harry. "You'll always be welcome here dear, you'll go back there over my dead body."
Moments later and with a loud crack she appeared on Privet Drive, immediately casting a notice-me-not in case anyone was watching. Approaching number 4 she could hear shouting, and a large man appeared around the side of the house with a wheelbarrow full of broken bricks, bits of wood and glass, and some twisted metal bars. He looked vaguely familiar. In fact, lose 20 stone and the ridiculous moustache …
"Vernon Prewett! You were a horrible little boy before those Dursley muggles took you in and now I see you've not improved." She stormed across the road, right up to the now-frightened looking Vernon, her wand sparking - and slapped him hard across his face. "And to think I defended you at first before Aunt Beth and Uncle Marcian gave you to the muggles. As if it wasn't enough that you bullied your little sister because she had magic and you don't, but now I see that you're still at it, behaving like a nasty jealous child."
She shot a stinging hex at his crotch and he doubled over in pain, falling to one side, and then a powerful sticking charm at the wheelbarrow to preserve the evidence.
"I shall be going straight to the DMLE you nasty little man."
And with that she apparated away.