Two pair: Raise this river?

[Archon_Wing]

Wasn't really paying attention to this hand; clicked the call button kinda fast.

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PokerStars NL Hold'em Ring - 0.05/0.10 Blinds (3 handed)

Starting Stacks
Seat 1: Big blind ($24.25)
Seat 3: Button (Hero) ($9.85)
Seat 4: Small blind ($3.45)

Preflop: Hero is Button with A/images/graemlins/diamond.gif, Q/images/graemlins/spade.gif.
Hero raises ($0.40), Small blind folds, Big blind calls ($0.30)

Flop: ($0.85) A/images/graemlins/spade.gif, 5/images/graemlins/diamond.gif, Q/images/graemlins/club.gif <font color="#0000FF">(2 players)</font>
Big blind checks, Hero bets ($0.60), Big blind calls ($0.60)

Turn: ($2.05) 7/images/graemlins/spade.gif <font color="#0000FF">(2 players)</font>
Big blind checks, Hero bets ($1.25), Big blind calls ($1.25)

River: ($4.55) 6/images/graemlins/club.gif <font color="#0000FF">(2 players)</font>
Big blind bets ($1.40), Hero calls ($1.40)

[Stake Monster]

Yes raise the river. I'd bet a bit more on the turn as well.

[Genz]

[ QUOTE ]
Yes raise the river. I'd bet a bit more on the turn as well.

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[yeotaJMU]

[ QUOTE ]
Yes raise the river. I'd bet a bit more on the turn as well.

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[orange]

river is an easy raise.

[KreellKeiser]

Definitely raise.

My best guess would be that he has A6. He could have slowplayed a set, but I just don't see it as very likely. These micro limit players love to play weak aces exactly like this, so he most likely has a smaller 2 pair or just a pair of aces.