Turned set, multiway pot line check

No important reads on anyone.

I decided to slow-play the turn since I thought the preflop raiser was weak and I wanted to get a loose call from him on the river when he checked to me. I also was hoping for an overcall behind me. Bet flop? Raise turn? How much to bet on the river?

PokerStars No-Limit Hold'em, $4 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

SB ($264.80)
BB ($396)
UTG ($626.85)
MP ($308.65)
CO ($408.60)
Hero ($385.60)

Preflop: Hero is Button with 9http://www.flopturnriver.com/phpBB2/...es/diamond.gif, 9http://www.flopturnriver.com/phpBB2/...iles/spade.gif.
UTG raises to $16, 2 folds, Hero calls $16, SB calls $14, BB calls $12.

Flop: ($64) 5http://www.flopturnriver.com/phpBB2/...es/diamond.gif, Khttp://www.flopturnriver.com/phpBB2/...iles/heart.gif, 6http://www.flopturnriver.com/phpBB2/...iles/spade.gif (4 players)
SB checks, BB checks, UTG checks, Hero checks.

Turn: ($64) 9http://www.flopturnriver.com/phpBB2/...miles/club.gif (4 players)
SB checks, BB checks, UTG bets $32, Hero calls $32, SB folds, BB folds.

River: ($128) 8http://www.flopturnriver.com/phpBB2/...iles/heart.gif (2 players)
UTG checks, Hero bets $76