Stoppin and Goin with trips

At first, I was going to go with my standard SOP here, which is call the flop raise then check raise the turn. Then I noticed the straight draw, and figured he was trying to con me into giving him a free card. So I stop + go'ed his ass. Comments on all streets appreciated.

Paradise Poker 2/4 Hold'em (8 handed)

Preflop: Hero is BB with 5/images/graemlins/club.gif, 5/images/graemlins/diamond.gif.
<font color="666666">1 fold</font>, UTG+1 calls, <font color="666666">2 folds</font>, CO calls, <font color="666666">2 folds</font>, Hero checks.

Flop: (3.50 SB) 6/images/graemlins/diamond.gif, 5/images/graemlins/heart.gif, 8/images/graemlins/spade.gif <font color="blue">(3 players)</font>
<font color="CC3333">Hero bets</font>, UTG+1 folds, <font color="CC3333">CO raises</font>, Hero calls.

Turn: (3.75 BB) K/images/graemlins/spade.gif <font color="blue">(2 players)</font>
<font color="CC3333">Hero bets</font>, <font color="CC3333">CO raises</font>, <font color="CC3333">Hero 3-bets</font>, CO calls.

River: (9.75 BB) T/images/graemlins/spade.gif <font color="blue">(2 players)</font>
<font color="CC3333">Hero bets</font>, CO calls.

Final Pot: 11.75 BB