nl50 Turn T-high flush, villain shoves river

[gregorio]

1st hand at table and 1st ever vs villain. Comments on river, please. What if board isn't paired?

Poker Stars, $0.25/$0.50 NL Hold'em Cash Game, 6 Players
UTG: $63.10
MP: $75.10
CO: $54.10
BTN: $66.55
SB: $48.75
Hero (BB): $50

Pre-Flop: 7[img]/images/graemlins/club.gif[/img] T[img]/images/graemlins/club.gif[/img] dealt to Hero (BB)
UTG folds, MP calls $0.50, 3 folds, Hero checks

Flop: ($1.25) K[img]/images/graemlins/club.gif[/img] 9[img]/images/graemlins/diamond.gif[/img] 9[img]/images/graemlins/club.gif[/img] (2 Players)
<font color="red">Hero bets $1</font>, MP calls $1

Turn: ($3.25) 5[img]/images/graemlins/club.gif[/img] (2 Players)
<font color="red">Hero bets $3</font>, MP calls $3

River: ($9.25) 4[img]/images/graemlins/heart.gif[/img] (2 Players)
<font color="red">Hero bets $6</font>, <font color="red">MP raises to $70.60 and is All-In</font>,