Flopped set in early position?

[__Q__]

PokerStars No-Limit Hold'em, $0.25 BB (8 handed) converter

MP1 ($22.40)
MP2 ($31.45)
CO ($36.30)
Button ($14.15)
SB ($28.65)
BB ($22.40)
UTG ($9.50)
Hero ($28.05)

Preflop: Hero is UTG+1 with 2[img]/images/graemlins/heart.gif[/img], 2[img]/images/graemlins/spade.gif[/img].
UTG calls $0.25, Hero calls $0.25, <font color="#666666">1 fold</font>, MP2 calls $0.25, CO calls $0.25, Button calls $0.25, SB completes, BB checks.

Flop: ($1.75) 2[img]/images/graemlins/diamond.gif[/img], 7[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(7 players)</font>
SB checks, BB checks, UTG checks, Hero checks, MP2 checks, CO checks, Button checks.

Turn: ($1.75) K[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(7 players)</font>
SB folds, BB checks, UTG checks, Hero checks, <font color="#CC3333">MP2 bets $2</font>, <font color="#CC3333">CO raises to $5</font>, Button folds, BB folds, UTG folds, Hero calls $5, MP2 folds.

River: ($13.75) 9[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">CO bets $5</font>, <font color="#CC3333">Hero raises to $22.8</font>, CO calls $17.80.

Final Pot: $59.35

How should I handle the turn?