One more LAGish hand 2nite

PLO$50
Seat 1: ($27.85)
Seat 3: ($33.45)
Seat 4$81.90)
Seat 6: Hero ($47.80)
Seat 7: ($29.15)
Seat 8: villian ($40.50)
Seat 9: ($41.10)
Seat 9 posts the small blind of $0.25
Seat 1 posts the big blind of $0.50
The button is in seat #8
*** HOLE CARDS ***
Dealt to Hero [5[img]/images/graemlins/heart.gif[/img] 6[img]/images/graemlins/spade.gif[/img] 9[img]/images/graemlins/heart.gif[/img] 7[img]/images/graemlins/heart.gif[/img]]
UTG folds
UTG+1 calls $0.50
Hero calls $0.50
CO calls $0.50
Villian calls $0.50
SB calls $0.25
BB checks
6 to the flop $3 in pot
*** FLOP *** [6[img]/images/graemlins/heart.gif[/img] 8[img]/images/graemlins/spade.gif[/img] 3[img]/images/graemlins/heart.gif[/img]
SB checks
BB checks
UTG+1 checks
Hero bets $3
CO folds
Villian calls $3
SB folds
BB folds
UTG+1 calls $3
3 to the turn, $12 in pot
*** TURN *** [2[img]/images/graemlins/spade.gif[/img]]
UTG+1 checks
Hero bets $12 (I figure I can represent a set here or should I slow down with 2 callers?)
Villian calls $12
UTG+1 folds
2 to river, $36 in pot. villian has 25 behind
*** RIVER *** [Q[img]/images/graemlins/spade.gif[/img]]
Hero ???
Should I stay aggressive and put him all in here or check/fold?