River decision with straight after board pairs

[Bump_Bailey]

Full Tilt Poker No-Limit Hold'em, $2 BB (5 handed) Hand History converter Courtesy of PokerZion.com

saw flop|<font color="#C00000">saw showdown</font>

<font color="#C00000">Button ($110.95)</font>
SB ($193.30)
<font color="#C00000">Hero ($201.25)</font>
UTG ($256.15)
MP ($140.90)

Preflop: Hero is BB with J[img]/images/graemlins/heart.gif[/img], T[img]/images/graemlins/spade.gif[/img].
UTG calls $2, <font color="#666666">1 fold</font>, Button calls $2, <font color="#666666">1 fold</font>, Hero checks.

Flop: ($7) A[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, UTG checks, Button checks.

Turn: ($7) Q[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets $6</font>, UTG folds, <font color="#CC3333">Button raises to $12</font>, <font color="#CC3333">Hero raises to $40</font>, Button calls $28.

River: ($87) A[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero ?

Villain seems to be loose passive, ALL IN or bet/fold? Don't think I have any other room on river with stack sizes.

[Mossberg]

no way you can b/f here. ALLIN!

[thac]

Yeah seriously, he has less than a psb left, shoveltime