$100NL TPTK, Facing C/R From Blinds

[Tinga]

Villain is present at two other tables of mine, playing aggressive, has no problem 3-betting PF, playing pretty activly -- running 24/8 over 160 hands. Hero has shown down solid hands, and has been getting decent cards. Running kinda nitty at this table though.


PokerStars No-Limit Hold'em, $1.00 BB (5 handed) pokerhand.org hand converter

Hero ($137.50)
MP ($171)
Button ($10.50)
SB ($105.50)
BB ($180.25)

Preflop: Hero is UTG with K[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/spade.gif[/img].
<font color="#CC3333">Hero raises to $4</font>, MP calls $4, <font color="#666666">1 fold</font>, SB calls $3.50, <font color="#666666">1 fold</font>.

Flop: ($13) K[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/club.gif[/img], 2[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">Hero bets $8</font>, MP calls $8, <font color="#CC3333">SB raises to $39</font>, Hero ???

This is an easy push if I have the Ac, but since I don't, I feel like tossing it. Kinda think he's raising on the draw to the nuts.

Thoughts?