5/10 NL - 2nd nut flush on 4 to a flush board

[Mat]

Villain is 29/16/2 on less than 50 hands, don't have much of a read on him yet and no history but he seems to cold call a lot in the blinds. I'm running around 26/22/3.

Poker Room skin
No Limit Holdem Ring game
Blinds: $5/$10
4 players
Converter

Stack sizes:
UTG: $826.00
Hero: $1.171.00
SB: $3.557.90
BB: $1.377.00

Pre-flop: (4 players) Hero is Button with Q[img]/images/graemlins/heart.gif[/img] 2[img]/images/graemlins/heart.gif[/img]
UTG folds, <font color="#cc0000">Hero raises to $35</font>, SB folds, BB calls.

Flop: 6[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/heart.gif[/img] 5[img]/images/graemlins/heart.gif[/img] ($75, 2 players)
BB checks, <font color="#cc0000">Hero bets $50</font>, BB calls.

Turn: 9[img]/images/graemlins/heart.gif[/img] ($175, 2 players)
<font color="#cc0000">BB bets $75</font>, <font color="#cc0000">Hero raises to $240</font>, BB calls.

River: 7[img]/images/graemlins/heart.gif[/img] ($655, 2 players)
<font color="#cc0000">BB is all-in $1,052,</font>

This is an overbet as I have $864 left.