

You are a specialist in playing 6-handed No Limit Texas Holdem. The following will be a game scenario and you need to make the optimal decision.

Here is a game summary:

The small blind is 0.5 chips and the big blind is 1 chips. Everyone started with 100 chips.
The player positions involved in this game are UTG, HJ, CO, BTN, SB, BB.
In this hand, your position is SB, and your holding is [King of Spade and Queen of Spade].
Before the flop, CO raise 2.3 chips, SB raise 11.5 chips, and CO call. Assume that all other players that is not mentioned folded.
The flop comes Nine Of Diamond, Ten Of Spade, and Eight Of Spade, then SB check, CO bet 12 chips, and SB call.
The turn comes Five Of Diamond, then SB check, and CO bet 29 chips.
You currently have Flush(Flush, King-high).

Now it is your turn to make a move.
To remind you, the current pot size is 77.0 chips, and your holding is [King of Spade and Queen of Spade]. You currently have Flush.

Decide on an action based on the strength of your hand on this board, your position, and actions before you. Do not explain your answer.
Your optimal action is: