We had this hand yesterday and my partner opened 1NT - strong - 15-17 points balanced hand.
My hand is strong opposite this open, but I am hesitant to suggest NT, but depending on partner's hand, I am also reluctant to suggest we play in a minor.
We used to have a bid of 3c that would suggest 5-5 minors invitational, and 3d would suggest 5-5 minors game force. We have adopted 3c as puppet stayman so our 3d jump is a bit undecided. We need to discuss further but I think we will conclude that 3D over 1N must be a forcing bid - at least 1 round. Even with this bid in place, I might find out where my partner would like to play the hand but I don't know the strength and I really do want to know about aces and about points.
Meanwhile, we did not have that understanding.
With my hand I want us to be in game and frankly, possible slam if partner fills in the appropriate blanks.
Our bidding got confused because I bid 2S - which we treat as a size ask that doubles as a club transfer. This is a relatively new bid for us and we needed to read more about subsequent bids. My partner showed a maximum bid by transferring to clubs. Then we got messed up (I think we had not decided how to treat a hand like this) so I am very interested as to how we should have bid this.