Time to lay down trips on turn?

[cmac99]

Opponent is tight preflop and likes to limp in to see flops when he does enter a pot. Post-flop he is usually aggressive but isn't likely to try any major bluffs. I'm wondering if with the stack sizes involved if pushing is justified.

Poker Stars
No Limit Holdem Ring game
Blinds: $1/$2
7 players
Converter

Stack sizes:
UTG: $190
UTG+1: $186
MP1: $73.25
CO: $226.95
Button: $155.95
SB: $144.90
hero: $89

Pre-flop: (7 players) hero is BB with K[img]/images/graemlins/diamond.gif[/img] 3[img]/images/graemlins/spade.gif[/img]
UTG calls, 4 folds, SB calls, hero checks.

Flop: 6[img]/images/graemlins/heart.gif[/img] 9[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/club.gif[/img] ($6, 3 players)
SB checks, hero checks, <font color="#cc0000">UTG bets $5</font>, SB folds, hero calls.

Turn: K[img]/images/graemlins/spade.gif[/img] ($16, 2 players)
<font color="#cc0000">hero bets $14</font>, <font color="#cc0000">UTG raises to $28</font>, hero ???