NL200, straight on the river facing tricky bet

[Paul Levy]

Early in the session, no reads on villain, I've already raised light out of position a few times.

PokerStars Pot-Limit Hold'em, $2 BB (8 handed) Poker Stars Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

saw flop|<font color="#C00000">saw showdown</font>

SB ($198)
BB ($117)
UTG ($356.90)
UTG+1 ($105.25)
MP1 ($148.15)
<font color="#C00000">MP2 ($182.95)</font>
CO ($317.30)
<font color="#C00000">Hero ($197)</font>

Preflop: Hero is Button with J[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/spade.gif[/img].
<font color="#666666">3 folds</font>, MP2 calls $2, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to $6</font>, SB calls $5, <font color="#666666">1 fold</font>, MP2 calls $4.

Flop: ($20) 8[img]/images/graemlins/heart.gif[/img], 2[img]/images/graemlins/heart.gif[/img], T[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, MP2 checks, <font color="#CC3333">Hero bets $11</font>, SB folds, MP2 calls $11.

Turn: ($42) T[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">MP2 bets $20</font>, Hero calls $20.

River: ($82) Q[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">MP2 bets $50</font>, Hero ?