River Decision

SB is 20/16/2.6 Reasonable preflop, overplays postflop.
UTG 70/5/0.5 Chase pretty much anything too the river.
UTG+1 just sat down.

6-handed 10/20. UTG Calls. UTG+1 calls. SB completes. I check QT in the bb

The flop is Q76.
SB bets. I raise. UTG+1 and SB call

The turn is a T. check, I bet, UTG+1 fold, sb calls.

River is 7, sb bets, I raise/call raise/fold or call?

Seemed like a fishy river bet too me, unsure what's best.


.

[Catt]

I call. I think this is a bluff or a 7 or an 89 hand that didn't want you folding to a turn raise way more often than a worse hand that pays off a raise. It's tough (impossible?) to put him on hand that you beat that actually improved with the river, and tough to put yourself on a hand (in his view) that was counterfeited by the river. If a bluff, he's folding; if a seven, there's a good chance he's three-betting (but in any event you lose the extra bet from a raise).