Partner [WEST[ is in a 6♦ contract witch is cold.
Lead is the Ace of Hearts
East [Dummy] has 3 of hearts with his diamonds as shown.
On Ace of Hearts lead by North King is played.
South follows and immediately tells West that 3 of diamonds is a heart.
North also holds Q hearts.
Director is called and states that K hearts is played and that is it
South knew from the beginning that 3 of hearts was in with diamonds
but waited till K of hearts was played to draw attention
Is this proper
Thank you