I'm sorry to hear about your Mum 💐
I'm glad DD got it back. You can re buy the charms (as you'd planned - have you cancelled the order yet??) but it's not the same, especially the one from your Mum.
As for 'secrets' of course your DD is allowed to keep the confidence of a friend without having to share it with DSD, to say otherwise is ridiculous.
Locks on internal doors. I don't like them. Partly because I think the 'bigger issues' need sorting if people feel the need to lock things up in their own home (from insiders rather than outsiders) and because it just looks so awful - which I guess is just the constant reminder of the horrible behaviour. Do you have a key to the padlock? I wouldn't want a teenager feeling they can lock their parents out of their rooms, at 14 she's too young for that 'privilege'. Your DD sounds lovely, but also please keep an eye on her behaviour around it. If I overheard anything to indicate DD was lording it over DSD it would come off there and then ('Ha ha I can lock you out' 'It's in my room and I've locked it so there').
But apart from all that, is the safety aspect. Please make sure the inside bolt in particular is one YOU could easily shoulder off if you needed to.
As for DSD's punishment.
- she still took it
- she still lied about it
- she's saying it was because of the 'secret pregnancy'. Was it or is that just convenient?
- DD gets to live with DSD's Dad all the time & she doesn't, which must at times seem so unfair BUT DSD gets advantages of having her own room and her Mum separately too. Complicated.
I guess only you know if this is a case of a) She's a PITA who thinks the world owes her & this is yet another thing or b) She's generally a good, sweet kid, really lashing out when she was hurting and didn't have the resources to deal with it any better
Given her Mum's reaction, I'm tempted to think she's a bit of a PITA who needs some boundaries in both homes but also to be listened to and talked with about the things she thinks are unfair. Not because she's right, but because she needs to be understood.
I'd talk to her about what she thinks a suitable punishment is - because there needs to be one.