NL25 FR set vs probable flush

The guy had 18% AFq, AF 1 on his small sample. I think he has a flush there the great majority of the time. What do you think?

PokerStars - $0.25 NL FAST - Holdem - 9 players
Hand converted by PokerTracker 4

BTN: 129.56 BB (VPIP: 12.05, PFR: 7.63, 3Bet Preflop: 3.54, Hands: 753)
SB: 100 BB (VPIP: 13.33, PFR: 10.00, 3Bet Preflop: 3.92, Hands: 120)
BB: 101.8 BB (VPIP: 14.29, PFR: 11.56, 3Bet Preflop: 5.57, Hands: 1,042)
UTG: 100 BB (VPIP: 14.02, PFR: 9.06, 3Bet Preflop: 3.19, Hands: 1,634)
UTG+1: 83.6 BB (VPIP: 31.25, PFR: 0.00, 3Bet Preflop: 0.00, Hands: 32)
MP: 83.8 BB (VPIP: 27.27, PFR: 18.18, 3Bet Preflop: 0.00, Hands: 11)
MP+1: 264.8 BB (VPIP: 16.87, PFR: 14.06, 3Bet Preflop: 3.41, Hands: 252)
MP+2: 30.04 BB (VPIP: 20.00, PFR: 0.00, 3Bet Preflop: 0.00, Hands: 5)
Hero (CO): 100.4 BB

SB posts SB 0.4 BB, BB posts BB 1 BB

Pre Flop: (pot: 1.4 BB) Hero has 7♣ 7♠

fold, UTG+1 calls 1 BB, fold, fold, fold, Hero calls 1 BB, fold, fold, BB checks

Flop: (3.4 BB, 3 players) 6♥ K♥ 2♦
BB checks, UTG+1 checks, Hero checks

Turn: (3.4 BB, 3 players) 7♦
BB checks, UTG+1 checks, Hero bets 4 BB, fold, UTG+1 calls 4 BB

River: (11.4 BB, 2 players) A♥
UTG+1 bets 78.6 BB and is all-in, fold