Trips facing river bet

Opp. is 51/11/3.75 after ~70 hands. Raise/call?

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

MP3 ($35.70)
CO ($20.95)
Hero ($93.25)
SB ($168.11)
BB ($20.27)
UTG ($105.80)
UTG+1 ($80.30)
UTG+2 ($60.85)
MP1 ($56.15)
MP2 ($66.80)

Preflop: Hero is Button with Khttp://www.flopturnriver.com/phpBB2/...es/diamond.gif, Qhttp://www.flopturnriver.com/phpBB2/...iles/heart.gif. SB posts a blind of $0.50.
UTG calls $1, 3 folds, MP2 calls $1, 2 folds, Hero calls $1, SB (poster) completes, BB checks.

Flop: ($5) 6http://www.flopturnriver.com/phpBB2/...es/diamond.gif, 8http://www.flopturnriver.com/phpBB2/...miles/club.gif, Qhttp://www.flopturnriver.com/phpBB2/...iles/spade.gif (5 players)
SB checks, BB checks, UTG checks, MP2 checks, Hero bets $3, SB folds, BB folds, UTG calls $3, MP2 folds.

Turn: ($11) Qhttp://www.flopturnriver.com/phpBB2/...miles/club.gif (2 players)
UTG checks, Hero bets $8, UTG calls $8.

River: ($27) 3http://www.flopturnriver.com/phpBB2/...es/diamond.gif (2 players)
UTG bets $15, Hero..

I probably straight call this. The only time I'd consider raising is if I'm also willing to call an opp push.

The only hands that we beat that would call our river raise after leading the river, should be Qx.

yeah i would call. he is so loose he will have Qx a lot. you are paying off 66 or 88 or if he limped q8 utg i guess.