Generous to a fault?

We were on holiday with my in-laws recently. 

I know, lucky us.  No really.  It was Antigua.  Lucky us.

Anyway, my mother in law bought the children all a little token present.  A souvenir sort of thing.  S's was a necklace, made of shell, with a little dolphin pendant on it.  It wasn't expensive, but it was rather lovely: pretty and delicate, and significantly more tasteful than the ones either A or L chose.

Back in Blighty, Primary 1 are still working through their sounds, and this week's is ph.

Dolphin's got a ph in it.  said S, proudly, to me on Tuesday. That's why I took my dolphin necklace to school.
 It has, said I, encouragingly.  But where's your necklace now, S?
I gave it to my friend Molly.  She liked it so I said she could have it.

So I rang Molly's mother.  Who found it and promised to give it back.

We had Molly to play today, and I remembered the dolphin necklace when her mother came to pick her up. 

She'd given it back, apparently.  Or at least she'd given it to Molly to give back at school.

S, what did you do with your necklace?
I gave it to Annie.  Everyone really liked it and so I said Molly could have it first and then Annie.  Zoe's next.

So I texted Annie's mother.  Who rang back;  Annie is very distressed.  She has broken the necklace, and the dolphin has disappeared.

It doesn't matter really, it's not valuable, and I'm much more worried that Annie doesn't get into trouble for it, but what to say to S?

Because my immediate reaction was to tell her off for taking precious things into school and giving them away.  She can't do that, surely? 

But the more I think about it, the more proud I am of her.  She has something she loves but when someone else loves it, what is her reaction? She gives it to them.   That's more generous and less materialistic than I suspect I would be.

Actually, forget "suspect".  Than I know I would be.  Because although I have told S it was very kind of her to give it to both Molly and Annie, I've also told her that she's not to do it with anything else.

But I have a horrid feeling that was the wrong thing to say...