QQ with paired flop

[drdaman]

Anybody have any ideas on the liklihood we're behind to and A here? Due to the preflop action I think I can safely assume he does not have KK. There's the TT to worry about as well.
Feel free to critique the preflop action as well.

Seat 2: VILLAIN ($24.40)
Seat 8: HERO ($25.20)
VILLAIN posts the big blind of $0.25

The button is in seat #9
*** HOLE CARDS ***
Dealt to HERO [Qc Qh]
5 folds
HERO raises to $1.25
2 folds
VILLAIN raises to $2.25
HERO raises to $6.25
VILLAIN calls $4
*** FLOP *** [Ad Ac Tc]
VILLAIN bets $18.15, and is all in