[NL10] Correct raise on turn?

[MastermindT]

Raiser was 30/16/1.3 over 70 hands when this hand came up:

Party Poker No-Limit Hold'em, $0.10 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Button ($1.75)
SB ($4.66)
Hero ($18.61)
UTG ($4.48)
UTG+1 ($12.85)
MP1 ($1.90)
MP2 ($2.13)
MP3 ($12.02)
CO ($3.28)

Preflop: Hero is BB with 5[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/spade.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">UTG+1 raises to $0.3</font>, <font color="#666666">4 folds</font>, Button calls $0.30, SB calls $0.25, Hero calls $0.20.

Flop: ($1.20) A[img]/images/graemlins/heart.gif[/img], 2[img]/images/graemlins/spade.gif[/img], 5[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, <font color="#CC3333">Hero bets $0.5</font>, UTG+1 calls $0.50, Button folds, SB folds.

Turn: ($2.20) K[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $1.6</font>, <font color="#CC3333">UTG+1 raises to $3.2</font>, <font color="#CC3333">Hero ???