River bet with AA?

[Whitey]

PokerStars (9 handed) converter

Preflop: Hero is MP3 with A[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/heart.gif[/img]. SB posts a blind of 10.
<font color="#CC3333">UTG raises 60</font>, <font color="#666666">2 folds</font>, MP2 calls 60, <font color="#CC3333">Hero raises 140 to 200</font>, <font color="#666666">4 folds</font>, UTG calls, MP2 folds.

Flop: J[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/heart.gif[/img], 5[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
UTG checks, <font color="#CC3333">Hero bets 300</font>, UTG calls.

Turn: J[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
UTG checks, <font color="#CC3333">Hero bets</font> 300, UTG calls.

River: 8[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
UTG checks, Hero ?

Final Pot:

The turn bet was to try and induce a bluff, I was not expecting a call.No read on villan, first hand he had played.