top 2 unraised pot

[StructureK]

guy is 25/6/2.3 ~150 hands 24% limp

$2/$4 NL Hold'em Cash Game, 6 Players
LegoPoker Hand History Converter

BTN: $219.45
SB: $205.40
Hero (BB): $552.20
UTG: $761.90
MP: $418.40
CO: $420

Pre-Flop: 8[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/spade.gif[/img] dealt to Hero (BB)
UTG calls $4, MP folds, CO calls $4, BTN calls $4, SB folds, Hero checks

Flop: ($18) A[img]/images/graemlins/club.gif[/img] 8[img]/images/graemlins/diamond.gif[/img] 4[img]/images/graemlins/spade.gif[/img] (4 Players)
<font color="red">Hero bets $12</font>, UTG calls $12, 2 folds

Turn: ($42) 9[img]/images/graemlins/club.gif[/img] (2 Players)
Hero checks, <font color="red">UTG bets $40</font>, hero??


whats your plan for the rest of the hand?
At the time, I felt betting the turn was bad for multiple reasons, what do you thik?