(3+.40) Need help with nut flush draw

[pgjcbsn]

MP2 played every hand so his range is very wide.

Poker Stars
No Limit Holdem Tournament
Blinds: t25/t50
10 players
Converter

Stack sizes:
UTG: t1410
UTG+1: t710
UTG+2: t2925
MP1: t1790
MP2: t885
MP3: t1330
CO: t1050
Button: t1340
SB: t2140
hero: t1420

Pre-flop: (10 players) hero is BB with 5[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/club.gif[/img]
2 folds, UTG+2 calls t50 <font color="aaaaaa">(pot was t75)</font>, MP1 folds, MP2 calls t50 <font color="aaaaaa">(pot was t125)</font>, MP3 calls t50 <font color="aaaaaa">(pot was t175)</font>, CO calls t50 <font color="aaaaaa">(pot was t225)</font>, Button folds, SB calls t25 <font color="aaaaaa">(pot was t275)</font>, hero checks.

Flop: 9[img]/images/graemlins/club.gif[/img] 5[img]/images/graemlins/club.gif[/img] 2[img]/images/graemlins/club.gif[/img] (t300, 6 players)
SB checks, hero checks, UTG+2 checks, <font color="#cc0000">MP2 bets t100</font>, MP3 folds, CO calls t100 <font color="aaaaaa">(pot was t400)</font>, SB folds, hero ?