25NL 6max: AQo led into on flop

[nearlyalex]

Full Tilt Poker - No Limit Hold'em Cash Game - $0.10/$0.25 Blinds - 5 Players - (LegoPoker HH Converter)

SB: $5.30
BB: $22.95
UTG: $21.10
CO: $23.75
Hero (BTN): $24.65

Preflop: Hero is dealt Q[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/spade.gif[/img] (5 Players)
UTG folds, CO calls $0.25, <font color="red">Hero raises to $1.10</font>, 2 folds, CO calls $0.85

Flop: ($2.55) 4[img]/images/graemlins/diamond.gif[/img] 3[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/heart.gif[/img] (2 Players)
<font color="red">CO bets $5.00</font>, Hero calls $5.00

Turn: ($12.55) Q[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">CO bets $5.00</font>, Hero???

this was my 3rd hand at the table and had no reads/stats on this opponent. i wasn't too sure what to do on the flop either but i called not giving him credit for a set as he overbet the pot and thought if he had a set he would either let me do the betting or make a smaller bet i'm likely to call to get value?