I wouldn't be so sure about that. Mathilde got the belt back when we'd settled a few grudges and little else, IIRC. Panoramia, by this point, has played a massive role in feeding an entire Karak and making sure it stays fed for centuries to come, not even counting her own efforts to help the K8P Expedition. Also, both us and Kragg will be in the Karak to keep an eye on her as well.
Although the real question is whether the Empire even has a tradition of wedding rings. Proposal and marriage might be carried out in entirely different ways, like with that apparent Stirlandian tradition of giving somebody a wooden spoon to show romantic interest.
@BoneyM can you clarify?