NL25: AQo vs. agressive player on monotone flop

[guess who]

Hi there,

villian is playing tight and very agressive after flop. He often just minraises preflop and after flop. Mostly I have no clue what he is holding. This is the first hand between the two of us:

We both have 100BBs

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

Pre-flop: (5 players) Hero is CO with Q[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/diamond.gif[/img]
<font color="#cc0000">UTG raises to $0.5</font>, <font color="#cc0000">Hero raises to $2</font>, 3 folds, UTG calls.

Flop: 4[img]/images/graemlins/club.gif[/img] 9[img]/images/graemlins/club.gif[/img] 5[img]/images/graemlins/club.gif[/img] ($4.4, 2 players)
<font color="#cc0000">UTG bets $3</font>, Hero calls.

Turn: Q[img]/images/graemlins/diamond.gif[/img] ($10.4, 2 players)
<font color="#cc0000">UTG bets $6</font>, Hero ???

Should I have folded the flop?
What now? Shove? Clear fold?

Maybe I post a second hand later.

Thank you guys,
guess