Passive with flopped trips

I'm not happy with my line at all. How do you play it? Villian is 53/6 over very small sample.

Party Poker No-Limit Hold'em, $ BB (10 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

MP1 ($90.27)
MP2 ($107.35)
MP3 ($109.50)
Hero ($100)
Button ($199.70)
SB ($62.50)
BB ($102.15)
UTG ($18.50)
UTG+1 ($110.75)
UTG+2 ($212.79)

Preflop: Hero is CO with 9http://www.flopturnriver.com/phpBB2/...miles/club.gif, 5http://www.flopturnriver.com/phpBB2/...miles/club.gif. Hero posts a blind of $1. SB posts a blind of $0.50.
1 fold, UTG+1 calls $1, UTG+2 calls $1, MP1 calls $1, 2 folds, Hero (poster) checks, 2 folds, BB checks.

Flop: ($5.50) 9http://www.flopturnriver.com/phpBB2/...es/diamond.gif, Thttp://www.flopturnriver.com/phpBB2/...iles/spade.gif, 9http://www.flopturnriver.com/phpBB2/...iles/heart.gif (5 players)
BB checks, UTG+1 bets $1, UTG+2 raises to $2, MP1 folds, Hero calls $2, BB folds, UTG+1 calls $1.

Turn: ($11.50) 7http://www.flopturnriver.com/phpBB2/...iles/heart.gif (3 players)
UTG+1 checks, UTG+2 bets $7.63, Hero calls $7.63, UTG+1 folds.

River: ($26.76) 6http://www.flopturnriver.com/phpBB2/...iles/heart.gif (2 players)
UTG+2 bets $10.58, Hero calls $10.58.

Final Pot: $47.92

I'm worried UTG+2 has trips with a better kicker. I probably re-raise the flop to $8 or so and then slow way down if called. As played on the flop, I think I fold to the strong turn bet. I'm guessing he had you outkicked, or may have even flopped a boat?

Yeah, pot the flop. Find out early how much Mr. Minraise likes his hand. Those draws make me shudder.