AQo vs a back raise from early position

[Pocket77s]

3/6 hold'em, local cardroom

Hero is on the 1 off the button with AQo

Villian calls, #6 calls, Hero raises, Button folds, SB calls, BB calls, Villian 3bets, #6 calls, Hero calls, SB caps, everybody calls (16SB)

Flop: K /images/graemlins/spade.gifQ /images/graemlins/diamond.gif7 /images/graemlins/club.gif

Villian bets, 6calls, Hero calls, SB calls,

Turn: 9 /images/graemlins/heart.gif
Villian betts, 6folds, Hero calls, SB raises, Villian calls, Hero folds.

SB made two pair on the turn, didn't get to see what the villian was holding. Comments?

[QTip]

It's hard to say without reads.