NL 25/50 - Rivered my fullhose but WTF?!?!

[SteveyJay]

Villain is running 23/18 over about 70 hands, have never played wirh him before and didnt notice anything special about him. But might be a regular since i dont play NL5k very much.

What to do on the river? And what hands do u put him on? Its 3250 more on the river for me

Im beating pretty much only a bluff on this river which is unlikely in my opinion, but he would be retarded to check this flop 4ways with a set. But on the other side ppl are stupid and overvalue hands or do stupid bluffs


Party Poker - No Limit Hold'em Cash Game - $25/$50 Blinds - 8 Players - (LegoPoker HH Converter)

SB: $8,458.00
BB: $8,340.00
UTG: $4,950.00
UTG+1: $1,050.00
MP1: $5,465.00
Hero (MP2): $12,125.00
CO: $2,399.71
BTN: $4,925.00

Preflop: Hero is dealt 5[img]/images/graemlins/club.gif[/img] 5[img]/images/graemlins/diamond.gif[/img] (8 Players)
UTG raises to $200.00, 2 folds, Hero calls $200.00, CO calls $200.00, 2 folds, BB calls $150.00

Flop: ($825) 6[img]/images/graemlins/diamond.gif[/img] 9[img]/images/graemlins/club.gif[/img] Q[img]/images/graemlins/heart.gif[/img] (4 Players)
BB checks, UTG checks, Hero checks, CO checks

Turn: ($825) 6[img]/images/graemlins/diamond.gif[/img] 9[img]/images/graemlins/club.gif[/img] Q[img]/images/graemlins/heart.gif[/img] 9[img]/images/graemlins/diamond.gif[/img] (4 Players)
BB checks, UTG checks, Hero checks, CO checks

River: ($825) 6[img]/images/graemlins/diamond.gif[/img] 9[img]/images/graemlins/club.gif[/img] Q[img]/images/graemlins/heart.gif[/img] 9[img]/images/graemlins/diamond.gif[/img] 5[img]/images/graemlins/spade.gif[/img] (4 Players)
BB checks, UTG bets $450.00, Hero raises to $1,500.00, 2 folds, UTG raises all-in to $4,750.00, Hero ????

Pot Size: $10,325.00 ($5 Rake)