River Decision--Call the all-in?

[Finwe]

Fairly new to table. No real reads on villain, maybe a tad aggressive. Who calls this? Who bets more on the turn?

Party Poker No-Limit Hold'em, $1 BB (10 handed) converter


Hero ($137.15)
BB (Villain)/ ($285.25)


Preflop: Hero is CO with 9[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/club.gif[/img].
<font color="#666666">6 folds</font>, <font color="#CC3333">Hero raises to $5</font>, Button calls $5, <font color="#666666">1 fold</font>, BB Villain/ calls $4.

Flop: ($15.50) 8[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
Villain checks, <font color="#CC3333">Hero bets $14</font>, Button folds, Villain calls $14.

Turn: ($43.50) A[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Villain checks, <font color="#CC3333">Hero bets $20</font>, Villain calls $20.

River: ($83.50) A[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Villain bets $246.25 (All-In)</font>, Hero...?

Is the all-in more a sign of weakness here? What is villain's hand range? Results later.

[amoeba]

I think its fairly obvious he has a boat.

[TheWorstPlayer]

Definitely bet more on the turn. In these heads up situations, I am bombing away. Guys LOVE to make heroic calls/ill-advised bluffs.