Low Pockets, Turned Set

[kamjah]

My first few hands at the table, and all i know is that villain has been calling a lot of big raises but folding to the river bets. My initial read here is that villain is continuation betting his AQ AK type hand so i re-raise him thinking my pockets are good. His instacall confuses me, what do you think he holds? And what would you do in this situation, and how would you bet it?

Party Poker No-Limit Hold'em, $ BB (6 max, 5 handed) FTR converter on zerodivide.cx

saw flop|<font color="#C00000">saw showdown</font>

Hero ($34.79)
MP ($48.25)
Button ($51.03)
SB ($129.55)
BB ($42.04)

Preflop: Hero is UTG with 4[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/club.gif[/img]. SB posts a blind of $0.25.
Hero calls $0.50, <font color="#666666">1 fold</font>, <font color="#CC3333">Button raises to $3</font>, <font color="#666666">2 folds</font>, Hero calls $2.50.

Flop: ($6.75) 6[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/diamond.gif[/img], 5[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">Button bets $4</font>, <font color="#CC3333">Hero raises to $10</font>, Button calls $6.

Turn: ($26.75) 4[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Hero...?