Can I 3 bet the river?

[Chairman Wood]

Party Poker 2/4 Hold'em (7 handed) converter

Preflop: Hero is MP1 with A[img]/images/graemlins/club.gif[/img], J[img]/images/graemlins/club.gif[/img].
UTG calls, <font color="#CC3333">Hero raises</font>, MP2 folds, CO folds, Button folds, SB calls, BB folds, UTG calls.

Flop: (7 SB) 7[img]/images/graemlins/spade.gif[/img], 9[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, UTG checks, <font color="#CC3333">Hero bets</font>, SB calls, UTG calls.

Turn: (5 BB) J[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, UTG checks, <font color="#CC3333">Hero bets</font>, SB calls, UTG folds.

River: (7 BB) K[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, <font color="#CC3333">SB raises</font>, Hero calls.

Final Pot: 11 BB

[Harv72b]

You're probably good most of the time, but I've seen much stranger things than someone hanging around on a board like this with QT. Against an unknown, I see nothing wrong with just calling the c/r.