NL25: Flopped top 2 multi-way --> turn play against a check raise?

[Sc1ence]

Full Tilt Poker - No Limit Hold'em Cash Game - $0.10/$0.25 Blinds - 5 Players - (LegoPoker Hand History Converter)

SB: $29.75
Hero (BB): $38.60
UTG: $27.05
CO: $24.20
BTN: $70.25

Preflop: Hero is dealt K[img]/images/graemlins/club.gif[/img] 4[img]/images/graemlins/club.gif[/img] (5 Players)
UTG folds, CO calls $0.25, BTN folds, SB calls $0.15, Hero checks

Flop: ($0.75) 5[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/spade.gif[/img] 4[img]/images/graemlins/spade.gif[/img] (3 Players)
SB checks, <font color="red">Hero bets $0.75</font>, CO calls $0.75, SB calls $0.75

Turn: ($3) Q[img]/images/graemlins/diamond.gif[/img] (3 Players)
SB checks, <font color="red">Hero bets $2.00</font>, CO calls $2.00, <font color="red">SB raises to $6.00</font>, Hero ???

SB was pretty LAG, especially in position. I have no idea what to do on this turn to a check-raise. I just don't see him re-raising this small with some kind of draw.

-Sc1ence.