Raised on the river, call or raise?

[wyattjames4]

PokerStars 0.25/0.50 Hold'em (10 handed) converter

Preflop: Hero is CO with 6[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/heart.gif[/img].
UTG folds, UTG+1 calls, UTG+2 folds, MP1 folds, MP2 folds, MP3 folds, Hero calls, Button calls, SB completes, BB checks.

Flop: (5 SB) 6[img]/images/graemlins/spade.gif[/img], T[img]/images/graemlins/club.gif[/img], 2[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, BB checks, UTG+1 checks, <font color="#CC3333">Hero bets</font>, Button folds, SB folds, BB folds, UTG+1 calls.

Turn: (3.50 BB) 3[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
UTG+1 checks, <font color="#CC3333">Hero bets</font>, UTG+1 calls.

River: (5.50 BB) A[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
UTG+1 checks, <font color="#CC3333">Hero bets</font>, <font color="#CC3333">UTG+1 raises</font>, <font color="#CC3333">Hero ...?

[MasterShakes]

Just call. There's a good chance that you're up against a flush with the way the hand was played. You could even be up against something like AT for a higher two-pair. If you 3-bet and he caps with the flush, then you've wasted two big bets while behind. This is an easy call rather than raise IMO.

[Nick Royale]

Agree, you need to be ahead about 60% of the time here to be able to 3-bet, and I think you're not