Flopped set, scary turn

[iluzion]

Party Poker 1/2 Hold'em (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Preflop: Hero is Button with K[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/club.gif[/img].
UTG calls, MP calls, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises</font>, <font color="#666666">2 folds</font>, UTG calls, MP calls.

Flop: (7.50 SB) K[img]/images/graemlins/spade.gif[/img], 4[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
UTG checks, MP checks, <font color="#CC3333">Hero bets</font>, UTG calls, MP folds.

Turn: (4.75 BB) 6[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">UTG bets</font>, <font color="#CC3333">Hero raises</font>

The raise is correct, right? Since he could have just hit his two pair, or finally popping with KQ or something like that.

If the raise is right, where do I go from here? If he calls or 3bets.