flopped set vs raiser

he is new to the table, pt stats 35/13/1.5, no reads

Party Poker No-Limit Hold'em, $ BB (6 max, 6 handed) converter

Hero ($101.35)
Button ($105.40)
SB ($230.92)
BB ($25)
UTG ($102.45)
MP ($137.49)

Preflop: Hero is CO with 6, 6. SB posts a blind of $0.50.
UTG calls $1, 1 fold, Hero calls $1, Button raises to $4, 1 fold, BB calls $3, UTG calls $3, Hero calls $3.

Flop: ($16.50) 6 , K, Q (4 players)
BB checks, UTG checks, Hero checks, Button bets $6, BB folds, UTG folds, Hero raises to $20, Button calls $14.

Turn: ($56.50) 2 (2 players)
Hero bets $30, Button calls $30.

River: ($116.50) T (2 players)
Hero ?????

Stick it all in He's getting > 3:1 and will call if he's called this far. No way that T helped him and it looks unlikely to have helped you either.

do it. i'm not even really sure what you're concerned about. if you can smell a set over set when an opp has just sat down, take out a 2nd mortgage and move 'er on up to 100-200NL

Easy push. You played it faster than I would have and he's gleefully dumping money in anyway... my guess is he has AK, and if he's calling that far, go the distance with him. If he has KK or AA (or god forbid, AJ) just pay the man his money.