Fold KK on the flop after aggression

[UmbertoEco]

Hey guys what do you think of this?
I smelled something fishy and managed to fold this. It's the first time I do this so any opinions are appreciated. This guy played 2 out of 15 hands. I have no other info on him. He stated in the chat that he had QQ. I do not know what he had but QQ, AA is my pick... Anyway.

Party Poker, $0.25/$0.50 NL Hold'em Cash Game, 5 Players
LegoPoker Hand History Converter

Hero (SB): $90.91
BB: $52.37
UTG: $60.97
CO: $48.71
BTN: $50.25

Pre-Flop: K[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/heart.gif[/img] dealt to Hero (SB)
<font color="red">UTG raises to $1</font>, 2 folds, <font color="red">Hero raises to $4</font>, BB folds, UTG calls $3

Flop: ($8.50) 5[img]/images/graemlins/club.gif[/img] 4[img]/images/graemlins/diamond.gif[/img] Q[img]/images/graemlins/diamond.gif[/img] (2 Players)
<font color="red">Hero bets $7</font>, <font color="red">UTG raises to $56.97 and is All-In</font>, Hero folds

Results: $22.50 Pot ($1.12 Rake)