$25NL: Set of Qs on a Monotone Flop

[OHFreak]

3rd hand at this table, no prior data on villain. In ya'll's experience do villains at this buyin usually do this with a draw or only with a made flush? Do you even consider folding?

Poker Room skin
No Limit Holdem Ring game
Blinds: $0.15/$0.25
9 players
Converter

Stack sizes:
UTG: $18.95
Hero: $25.00
MP1: $18.50
MP2: $5.70
MP3: $7.90
CO: $39.15
Button: $23.35
SB: $9.75
BB: $21.90

Pre-flop: (9 players) Hero is UTG+1 with Q[img]/images/graemlins/spade.gif[/img] Q[img]/images/graemlins/diamond.gif[/img]
UTG calls, <font color="#cc0000">Hero raises to $1.50</font>, 2 folds, MP3 calls, 4 folds, UTG calls.

Flop: Q[img]/images/graemlins/club.gif[/img] 7[img]/images/graemlins/club.gif[/img] 9[img]/images/graemlins/club.gif[/img] ($4.90, 3 players)
<font color="#cc0000">UTG is all-in $17.45</font>, Hero weeps quietly to himself