My sis had DS overnight (DS is 5). He was well behaved, had a great time etc etc. That afternoon DM picked him up from my sis house and took him out for the day.
Great. Except he'd pocketed some of my sister's rings - including her wedding ring. And he's lost it. Apparently my mum saw him playing with them in the shop, he said I'd given them to him and she said 'OK'.
My sis is distraught. What should I do? What can I do? I'm so upset.