NL100 - 2 pair on 3-flush flop, limped pot

[dirtylobster]

Do you play this differently and what's your line on the turn? Villain is 22/6/2.5 over 32 hands, has made weird plays occasionally.

Poker Stars, $0.50/$1 NL Hold'em Cash Game, 6 Players
LegoPoker Hand History Converter

UTG: $99.50
MP: $73.50
CO: $26.20
BTN: $281.40
SB: $84.55
Hero (BB): $128.95

Pre-Flop: 6[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/club.gif[/img] dealt to Hero (BB)
2 folds, CO calls $1, BTN folds, SB calls $0.50, Hero checks

Flop: ($3) 5[img]/images/graemlins/diamond.gif[/img] 6[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/diamond.gif[/img] (3 Players)
<font color="red">SB bets $4</font>, <font color="red">Hero raises to $14</font>, CO folds, SB calls $10

Turn: ($31) 2[img]/images/graemlins/heart.gif[/img] (2 Players)
SB checks, <font color="red">Hero bets $21</font>, <font color="red">SB raises to $42</font>......