100nl: Nut flush on river vs. over shove on paired board

[DiceMan14]

$165 effective stack size. Villain is 16/3/.8 over 200 hands. What hands am I ahead that he does this with? He had not shown signs of this type of aggression all session. I'm interested in some hand range analysis here. Thanks in advance.


Full Tilt Poker - No Limit Hold'em Cash Game - $0.50/$1 Blinds - 5 Players - (LegoPoker Hand History Converter)

SB: $243.80
Hero (BB): $164.50
UTG: $101.00
CO: $241.70
BTN: $110.20

Preflop: Hero is dealt 6[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/spade.gif[/img] (5 Players)
UTG folds, CO calls $1.00, BTN folds, SB calls $0.50, Hero checks

Flop: ($3) 9[img]/images/graemlins/spade.gif[/img] Q[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/diamond.gif[/img] (3 Players)
SB checks, <font color="red">Hero bets $3.00</font>, CO calls $3.00, SB calls $3.00

Turn: ($12) 9[img]/images/graemlins/spade.gif[/img] Q[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/spade.gif[/img] (3 Players)
SB checks, <font color="red">Hero bets $7.00</font>, CO calls $7.00, SB folds

River: ($26) 9[img]/images/graemlins/spade.gif[/img] Q[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/spade.gif[/img] 3[img]/images/graemlins/club.gif[/img] (2 Players)
<font color="red">Hero bets $23.00</font>, <font color="red">CO raises all-in to $230.70</font>, Hero ???
Uncalled bet of $207.70 returned to CO

Pot Size: $72.00 ($3 Rake)