25 NL: Overpair against donk deep.

[Shattered]

Poker Stars, $0.10/$0.25 NL Hold'em Cash Game, 6 Players
LeggoPoker Hand History Converter

BB: $37.60
UTG: $25
Hero (MP): $76
CO: $13.40
BTN: $64.65
SB: $26.15

Pre-Flop: Q[img]/images/graemlins/diamond.gif[/img] Q[img]/images/graemlins/spade.gif[/img] dealt to Hero (MP)
UTG folds, <font color="red">Hero raises to $1</font>, CO folds, BTN calls $1, 2 folds

Flop: ($2.35) 9[img]/images/graemlins/club.gif[/img] 2[img]/images/graemlins/club.gif[/img] 5[img]/images/graemlins/diamond.gif[/img] (2 Players)
<font color="red">Hero bets $1.75</font>, <font color="red">BTN raises to $3.50</font>, <font color="red">Hero raises to $11</font>, <font color="red">BTN raises to $63.65 and is All-In</font>, Hero folds

Villain's an 80/3/.7 over almost 100 hands.
This could be some sort of 9, but it could easily be AA, KK, or some kind of two pair as well. He's been really loose/passive before this and this is the first time I've seen him show any aggression.

Thoughts?