I remember reading that she had stopped wearing "Stefano's" wedding ring in the mid '90, but sometimes mags like to invent stories, so I don't know if this one is very accurate...I don't know about "Ernst's" rings...
I'm so glad to see her and Ernst smiling and leading their normal lives; Caroline really deserves some happiness!
Kisses
ETA: apparently the cross she often wears as a necklace was Stefano's; he left it home the day he had the accident, and she keeps it and wears it. Of this I'm pretty sure as Stefano's mother told the story in an old interview...