Bet into on the turn with flopped set

[JimmyJazz1]

Villian is a TAG from what I have seen

Party Poker No-Limit Hold'em, $ BB (6 max, 6 handed) converter

BB ($590.4)
UTG ($370.2)
Hero ($460.5)
CO ($574.73)
Button ($368.4)
SB ($205.9)

Preflop: Hero is MP with 7[img]/images/graemlins/diamond.gif[/img], 7[img]/images/graemlins/heart.gif[/img]. SB posts a blind of $2.
<font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to $12</font>, <font color="#666666">3 folds</font>, BB calls $8.

Flop: ($26) A[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, <font color="#CC3333">Hero bets $25</font>, BB calls $25.

Turn: ($76) 3[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">BB bets $55</font>, Hero?