Jewels - Part Three

Emily couldn't believe it. Some precious jewels, found at her best friend's old house? It was almost impossible. Things like this just didn't happen in Oakfield!
So, after an excited day at school, Emily waved goodbye to Sadie and set off dwon the road. Her pace was steady; after all, she had quite a way to go. She was only allowed to walk to Hammersmith Drive by herself and there she would meet her older brother Matthew.
Matthew was seventeen. His college course ended at the same time as Emily's school, so the meet-up was always at just the right time.
Another ten minutes passed and eventually Emily arrived, short of breath, at Hammersmith Drive. A tall boy with dark hair was waiting at the crossroad.
"Hi Matthew!" Emily called out. Matthew grinned and waved to his sister.
"Good day at school?" he queried. Emily nodded, and the pair set off along the pavement. The hot afternoon sun blazed down on them, and the gentle breeze rustled the leaves in the trees that lined the road.
As they turned the corner, and the mansion came into view upon the hill, Emily was reminded of Sadie's secret. A wide beam spread across her face, and this was enough for Matthew to realise that something was up.
"What's with the big grin?" he asked, grinning himself. He put his hands into his pockets as they continued along the road.
"Well..." Emily began. Then she hesitated. Surely she couldn't disobey her friend? This wasn't just a silly little secret. This was a big piece of news, and Sadie had begged Emily not to tell. But then again, this was only her brother. He was old enough to know that secrets were for keeping. It couldn't do any harm, could it? It wasn't as if Sadie would find out that Emily had spread the news or anything. So, entering a brave state of mind, Emily took a deep breath and explained everything.
"But do you promise you won't breathe a single word of this to anybody?" she finished.
"Of course I won't tell anyone," Matthew confirmed. "The secret's safe with me!"
But that was just it. Emily wasn't sure that it really was......