NL50 AQs im SB vs CO raise, bluff am flop

[waedi]

No IQ poker 0.50/1.00, hand converted by the iPoker Converter at Talking-Poker

saw showdown

Button ($53.85)
SB Hero ($50.95)
BB ($75.70)
UTG ($55.10)
UTG+1 ($42.97)
CO ($62.90)

Preflop: Hero is in the SB with A Q
1 fold, UTG+1 calls 0.50, CO raises to 2.50, 1 fold, Hero calls 2.25, 2 folds.

Flop (6.00) 6 5 7
Hero checks, CO bets 4.50, Hero raises to 15.00, 1 fold

villain 25/15/2.7/26

preflop 3bet oder call auch ok? pfr von 15 ist ja schon ziemlich tight.
bluff am flop ok?