My LHO (dealer) opened 1H and my partner bid 2H. My RHO asked the meaning of the bid, and I correctly stated our agreement, that it was natural, i.e only having a heart suit to bid, with opening points. I know others have different agreements, but that is ours.!
My partner had meant to bid 2D (picking the wrong card from the box), and didn’t know that she could correct it after my RHO had asked it's meaning. (We now realise that it could have been corrected as it was a manual error, but at the time she didn't.)
Following this more bidding continued and at the end of the auction my partner ended up in 3NT. (Unfortunately going one off - not enough hearts !)
Q. What at the end of the auction should (or shouldn’t) she have told our opponents to redress her error ?