25NL 6-Max - AQs call a flush draw on Flop?

[Fore59]

Villian 1 seems like a LAG, but I haven't seen enough hands to completely get a solid read on him. This is 25NL 6-Max in case you missed it.

Pre-Flop:

Villian 1 ($24) - calls .$25
Player folds
Villian 2 ($15) - calls .$25
Hero (A /images/graemlins/heart.gifQ /images/graemlins/heart.gif) raises to $1.00
SB folds
BB Folds
Villian 1 calls $.75
Villian 2 calls $.75

Flop: 3 /images/graemlins/club.gif9 /images/graemlins/heart.gifJ /images/graemlins/heart.gif

Villian 1 Checks
Villian 2 checks
Hero bets $2.50
Villian 1 raises to $23.75 and is all in.
Villain 2 folds
Hero....?????

Here's my thinking, because I think Villian is a LAG he could be making this move with a suited connector (78h, 65h, 45h etc.). But the check raise all-in screams a set from a solid player. So I'm stuck. Any suggestions would be appreciated. Thanks