Donk bet on the river by a TAG

[Absolution]

This guy is a level 1 thinking LAG/TAG. He is fairly active pre-flop, but seems straight forward post-flop. He tends to give up quite easily and generally plays weak-tight:

PokerStars 1/2 Hold'em (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

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

Flop: (4.50 SB) 8[img]/images/graemlins/spade.gif[/img], T[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, <font color="#CC3333">Hero bets</font>, BB calls.

Turn: (3.25 BB) 5[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, <font color="#CC3333">Hero bets</font>, BB calls.

River: (5.25 BB) 7[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">BB bets</font>, Hero...

This looks like a WA/WB line and this guy might know of this line. I'm wondering if I should raise here. I don't beat many aces though and he might just be playing his cards and hit 2 pair or a straight.