200nl: Nut flush draw!

[BlackAMEX]

BB is a loose very aggro donk - 78/43/12 over 50 hands.
Button is 40/0/0.5 over 100 hands.

If button doesnt exist, is turn a regulation call? Only problem I thought I had was that if I hit it would be very obvious, so not sure if I'd still get paid. Another issue was that I didn't know if my A out was clean.

However, in this case I've obv got another villian behind me. Does this make turn call better/worse?

Party Poker No-Limit Hold'em, $ BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Hero ($198)
Button ($104.02)
SB ($189.30)
BB ($167.15)
UTG ($216.63)

Preflop: Hero is MP with A[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/heart.gif[/img]. SB posts a blind of $1.
<font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to $8</font>, Button calls $8, SB (poster) calls $7, BB calls $6.

Flop: ($32) K[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/diamond.gif[/img], 5[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, <font color="#CC3333">BB bets $14</font>, Hero calls $14, Button calls $14, SB folds.

Turn: ($74) J[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">BB bets $44</font>, Hero ???