NL200 6max, TPTK: river decision

[Rkoo]

Villian is donkish LAG 45/15 after 80 hands. I've raised quite many hands preflop and Cbet most of them. For some reason i didn't bet this flop.
I want to know what you guys think of my turn play and what is right play at river.

PokerStars No-Limit Hold'em, $2 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

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

SB ($305.45)
<font color="#C00000">BB ($833.90)</font>
UTG ($40.25)
<font color="#C00000">Hero ($242)</font>
CO ($110.10)
Button ($200)

Preflop: Hero is MP with A[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/spade.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to $8</font>, <font color="#666666">3 folds</font>, BB calls $6.

Flop: ($17) 4[img]/images/graemlins/diamond.gif[/img], 3[img]/images/graemlins/heart.gif[/img], 3[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, Hero checks.

Turn: ($17) A[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, <font color="#CC3333">Hero bets $12</font>, <font color="#CC3333">BB raises to $24</font>, Hero calls $12. (??)

River: ($65) 6[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">BB bets $50</font>, Hero ??.

Call, raise/push or fold?