Aces facing river decision

[cooker3]

Villain is running 21/18/4 over 1000 hands although he has been somewhat tighter at this table so far

I am running at 27/25/3 over about 70 hands and have been very aggressive and near running over the table

iPoker No-Limit Texas Hold'em (NL100), $1.00 BB (5 handed) SilverKitty Hand History converter by www.pokeronline.com.ua

Hero($276.25)
Button ($245.3)
SB ($60.18)
Villain($102.5)
MP3 ($100)

SB: Post SB $0.50
Villain: Post BB $1.00

Preflop:
Hero is co with Ah As
<font color="#666666">1 folds</font>
<font color="#CC2222">Hero Raise $4</font>
<font color="#666666">2 folds</font>
Villain Call $3

Flop:($8.5) 2[img]/images/graemlins/club.gif[/img], J[img]/images/graemlins/heart.gif[/img], J[img]/images/graemlins/club.gif[/img]<font color="#0030DD">(2 players)</font>
Villain Check
<font color="#CC2222">Hero Bet $6.5</font>
Villain Call $6.5

Turn:($21.5) T[img]/images/graemlins/diamond.gif[/img]<font color="#0030DD">(2 players)</font>
<font color="#CC2222">Villain Bet $14.5</font>
Hero Call $14.5

River:($50.5) 4[img]/images/graemlins/diamond.gif[/img]<font color="#0030DD">(2 players)</font>
<font color="#CC2222">Villain Bet $45</font>
</font>

What does he have and should I call?