

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 UTG, and your holding is [King of Spade and King of Heart].
Before the flop, UTG raise 2.0 chips, and BTN call. Assume that all other players that is not mentioned folded.
The flop comes Ace Of Diamond, Nine Of Heart, and Eight Of Heart, then UTG check, and BTN check.
The turn comes Two Of Heart, then UTG check, BTN bet 6 chips, UTG raise 17 chips, and BTN call.
The river comes Ten Of Heart, then UTG bet 20 chips, and BTN raise 81 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 140.0 chips, and your holding is [King of Spade and King of Heart]. 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: