In a game of Spades I played recently, on the first trick of the round, South was first to play and I was second (West).
South lead Q♥ and I had K,3♥.
I Played the 3♥, since I was afraid to play the K♥ and let North to take it with the A♥. What happened is that South won the first trick with the Q♥, then lead his A♥ and won the second trick. Bids were 3,2,4,2 (S,W,N,E).
In what situations I should play the King over the queen when the Ace is still out there?