Monotone flop: turn nut straight

[TeeJayOrTJ]

This is early in a 27.50 PS tourney. MP2 in this hand is a donkey. Don't remember the specifics of the hand before this...but he doubled up and it was an ugly play.

PokerStars No-Limit Hold'em Tourney, Big Blind is t20 (9 handed) pokerhand.org hand converter

MP2 (t5010)
MP3 (t3290)
CO (t2960)
Button (t2330)
SB (t2600)
Hero (t2890)
UTG (t2970)
UTG+1 (t2490)
MP1 (t2600)

Preflop: Hero is BB with 5[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/club.gif[/img].
<font color="#CC3333">UTG raises to t60</font>, UTG+1 calls t60, <font color="#666666">1 fold</font>, MP2 calls t60, <font color="#666666">4 folds</font>, Hero calls t40.

Flop: (t250) 7[img]/images/graemlins/club.gif[/img], 3[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
Hero checks, UTG checks, UTG+1 checks, MP2 checks.

Turn: (t250) 4[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">Hero bets t200</font>, UTG folds, UTG+1 calls t200, MP2 calls t200.

River: (t850) A[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets t600</font>, UTG+1 folds, <font color="#CC3333">MP2 raises to t4750</font>, Hero????