KK faces big bet on turn - giving me possible flush draw

[n4rf]

Full Tilt No-Limit Hold'em, $0.10 BB (6 handed) Full Tilt Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

MP ($12.95)
CO ($1.90)
Button ($7.40)
SB ($10.65)
BB ($10.45)
Hero ($9.75)

Preflop: Hero is UTG with K[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/club.gif[/img].
<font color="#CC3333">Hero raises to $0.35</font>, MP calls $0.35, <font color="#666666">3 folds</font>, BB calls $0.25.

Flop: ($1.10) J[img]/images/graemlins/club.gif[/img], 8[img]/images/graemlins/spade.gif[/img], T[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">BB bets $0.6</font>, <font color="#CC3333">Hero raises to $1.8</font>, MP folds, BB calls $1.20.

Turn: ($4.70) 7[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">BB bets $4.7</font>, Hero?

Villain is unkown