AA scary board, line check.

[Hotrod0823]

PokerStars No-Limit Hold'em Tourney, Big Blind is t2000 (9 handed) FTR converter on zerodivide.cx

SB (t63015)
BB (t62690)
UTG (t32610)
UTG+1 (t22650)
Hero (t68278)
MP2 (t66260)
MP3 (t34430)
CO (t140514)
Button (t12484)

Preflop: Hero is MP1 with A[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises to t6000</font>, <font color="#666666">2 folds</font>, CO calls t6000, <font color="#666666">2 folds</font>, BB calls t4000.

Flop: (t16800) Q[img]/images/graemlins/spade.gif[/img], 7[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, Hero checks, CO checks.

Turn: (t16800) 7[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">BB bets t6000</font>, Hero calls t6000, <font color="#CC3333">CO raises to t12000</font>, BB folds, Hero calls t6000.

River: (t46800) 4[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, CO checks.

Final Pot: t46800

Not real happy with the river check but can't see myself calling a Raise so I elect to check it and see how hard the big stack pushes.

Should I be betting this ?