Set against possible completed flush on the turn

Hello again guys :f_drink::f_drink:

my doubt is about turn, how do you proceed when OOP the villain paid the flop with a flush draw and on the turn the flush is completed?

And when you are in position? what do you do ?

PokerStars - $0.02 NL (6 max) - Holdem - 4 players
Hand converted by PokerTracker 4

BB: 50.5 BB (VPIP: 75.00, PFR: 25.00, 3Bet Preflop: 0.00, Hands: 5)
Hero (CO): 100 BB
BTN: 148 BB (VPIP: 14.29, PFR: 7.76, 3Bet Preflop: 3.36, Hands: 341)
SB: 69.5 BB (VPIP: 40.00, PFR: 40.00, 3Bet Preflop: 0.00, Hands: 5)

SB posts SB 0.5 BB, BB posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has 7♣ 7♠

Hero raises to 3 BB, BTN calls 3 BB, fold, fold

Flop: (7.5 BB, 2 players) T♦ 3♦ 7♥
Hero bets 5 BB, BTN calls 5 BB

Turn: (17.5 BB, 2 players) A♦
Hero bets 12.5 BB, BTN calls 12.5 BB

River: (42.5 BB, 2 players) 4♦
Hero checks, BTN bets 9 BB, Hero calls 9 BB

BTN shows K♦ Q♦ (Flush, Ace High)
(Pre 49%, Flop 26%, Turn 77%)
Hero mucks 7♣ 7♠ (Three of a Kind, Sevens)
(Pre 51%, Flop 74%, Turn 23%)
BTN wins 58.5 BB

Thanks for your patiente