TPTK in position vs flush board

[HermannTL]

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finally i should add that there is a big difference between a monotone ATx flop and a monotone A8x flop. make sure you see why. in the latter you can probably wait until the turn.

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OK, I'll take a stab at it: the ATx flop easily create a gutshot (i.e. KQ) and it's more likely that someone is playing a Ten than an Eight ("playing zone" and all that).

PokerStars 0.10/0.20 Hold'em (7 handed) Poker Stars Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Preflop: Hero is CO with K[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/spade.gif[/img].
<font color="#666666">1 fold</font>, MP1 calls, MP2 calls, <font color="#CC3333">Hero raises</font>, <font color="#666666">1 fold</font>, SB calls, BB calls, MP1 calls, MP2 calls.

Flop: (10 SB) 4[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, BB checks, <font color="#CC3333">MP1 bets</font>, MP2 folds, <font color="#CC3333">Hero raises</font>, SB calls, BB folds, MP1 calls.

Turn: (8 BB) A[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, MP1 checks, <font color="#CC3333">Hero bets</font>, SB calls, MP1 folds.

River: (10 BB) Q[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, <font color="#CC3333">SB raises</font>,Hero...

I thought my river bet was for value, but this is a disgusting development. This seems like an odd line for villain but not a bluffing line. Call and hope it's only two pair? The pot is too big to even consider a fold, and a raise would be spew. Should I have checked behind in the 10 BB pot? My set of aces may be more than he bargained for.