Ack, Turn Blows Up In My Face

[Moozh]

Small Blind is tight/weak before the flop, but knows how to raise a bit post flop (20/2/1.5).

UTG seems to be loose passive, but has just arrived at the table recently.

I have very few hands on both.

Things were going along smoothly and then the turn just explodes in my face. I was completely lost. I figured I might get some more thoughtful answers if I do this in steps, so what do I do when it's two back to me on the turn?

Party Poker 3/6 Hold'em (6 max, 6 handed) converter

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

Flop: (7 SB) A[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, UTG checks, <font color="#CC3333">Hero bets</font>, SB calls, UTG calls.

Turn: (5 BB) 3[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">SB bets</font>, <font color="#CC3333">UTG raises</font>, Hero...