NL50 KK faced with a reraise push post-flop..

[anacrime]

Only played about 5 hands with this villain and he seemed kind of weak. I just opened up this hand history and realized I only bet $15 on the turn (about 1/2 pot). I thought I had raised more when I was playing this hand.

I have no read my opponent. Given this, should I fold to his push? I'm getting less than 3 to 1 odds on my money. Would a call be -EV? Would a random opponent make this play with something like AQspades? Or, could he have basically anything because I showed weakness with my flop bet? In this situation, I was pretty sure he had pocket queens or tens. I didn't think he would play deuces or aces like this.

Party Poker No-Limit Hold'em, $ Hero (6 max, 6 handed) converter

CO ($60.2)
Button ($16.6)
SB ($85.45)
Hero ($73.75)
UTG ($48.65)
MP ($57.4)

Preflop: Hero is BB with K[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/spade.gif[/img]. SB posts a blind of $0.25.
<font color="#CC3333">UTG raises to $3</font>, <font color="#666666">1 fold</font>, CO calls $3, <font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises to $8.5</font>, UTG calls $6, CO calls $6.

Flop: ($27.25) 2[img]/images/graemlins/spade.gif[/img], T[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets $15</font>, UTG calls $39.65 (All-In), CO folds, Hero???