NL4 Trips A on Flush Board

[guggi]

Titan Poker Random (Beginner) 0.02/0.04, hand converted by the iPoker Converter at Talking-Poker

saw flop | saw showdown

Button Button ($8.16)
SB ($5.03)
BB ($1.73)
UTG UTG ($8)
UTG+1 Hero ($9.41)
CO ($0.27)

Preflop: Hero is UTG+1 with A A
UTG raises to 0.16, Hero raises to 0.40, 1 fold, Button calls 0.40, 2 folds, UTG calls 0.24.

Flop (1.26) T 2 6
UTG checks, Hero bets 1.50, Button calls 1.50, 1 fold.

Turn (4.26) A
Hero bets 2.50, Button raises to 6.26, Hero calls 3.76.

River (16.78) K

Line Ok? Oder muss ich da angst for einem Flush haben?