sudden river aggression

[robrobdoe]

UTG+2 is 38/5/0.3 but after only 40 odd hands, no specific reads.

PokerStars 0.25/0.50 Hold'em (10 handed) Poker Stars Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Preflop: Hero is MP2 with A[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/heart.gif[/img].
<font color="#666666">2 folds</font>, UTG+2 calls, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises</font>, <font color="#666666">3 folds</font>, SB calls, BB calls, UTG+2 calls.

Flop: (8 SB) T[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, BB checks, UTG+2 checks, <font color="#CC3333">Hero bets</font>, SB folds, BB folds, UTG+2 calls.

Turn: (5 BB) 2[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
UTG+2 checks, <font color="#CC3333">Hero bets</font>, UTG+2 calls.

River: (7 BB) J[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">UTG+2 bets</font>, Hero...

Up to the river seems pretty standard, then the sudden donk on what seems a fairly nothing card. Most likely seems a passively played (both pre- and post-flop) JJ, a JT (which I beat), or a J and another OC. There's also a smaller possibility of a slowplayed 4, although I would've expected an earlier raise. I beat the majority of likely hands, so is a raise correct? What should I do if 3-bet?