Do I bet turn? 99 w position, lead, but A and caller on flush flop

[MyTurn2Raise]

Opponent (Snelly23) is 31/21/3 over 225 hands..notes thus far: very aggressive, raises with all hands I consider playable preflop, no real trash shown yet, bets draws (even gutshots) on flop

player was showing numerous winners


Texas Hold'em $2-$4 (real money)

PRE-FLOP
2 folds, snelly23 bets $4, 2 folds, HERO [9 [img]/images/graemlins/spade.gif[/img]9 [img]/images/graemlins/club.gif[/img]] bets $6, 2 folds,blinds fold, snelly23 calls $2.

FLOP [ 4 [img]/images/graemlins/club.gif[/img],7 [img]/images/graemlins/club.gif[/img],A [img]/images/graemlins/club.gif[/img] ]
snelly23 checks, HERO bets $2, snelly23 calls $2.

TURN [Q [img]/images/graemlins/spade.gif[/img] ]
snelly23 checks, HERO checks.

RIVER [8 [img]/images/graemlins/heart.gif[/img] ]
snelly23 bets $4, HERO calls $4.

SHOWDOWN


My table image is that I had been winning consistently over the past hour...up about $80 on the two tables with this opponent, playing 17/10/3 clip