I believe it's 'matron' of honour, dear.

我觉得" 大娘" 更适合你 亲爱的。

Daphne - older sister, matron of honour and all that.

Daphne - 她姐姐兼首席伴娘之类的。

You're a really crap matron of honour. Do you know that?

你简直就是一坨屎伴娘 你造吗？