J10 flops top pair call river overbet from possible missed draws?

[Teh1337zor]

Full Tilt Poker - No Limit Hold'em Cash Game - $2/$4 Blinds - 6 Players - (LegoPoker HH Converter)

SB: $98.60
BB: $634.70
<font color="black">UTG: $1,529.65</font>
MP: $174.65
<font color="black">Hero (CO): $323.75</font>
<font color="black">BTN: $466.50</font>

<font color="black">Preflop:</font> Hero is dealt J[img]/images/graemlins/diamond.gif[/img] T[img]/images/graemlins/diamond.gif[/img] (6 Players)
<font color="red">UTG raises to $12.00</font>, MP folds, Hero calls $12.00, BTN calls $12.00, 2 folds

<font color="black">Flop:</font> ($42) J[img]/images/graemlins/club.gif[/img] 8[img]/images/graemlins/club.gif[/img] 6[img]/images/graemlins/spade.gif[/img] (3 Players)
UTG checks, <font color="red">Hero bets $30.00</font>, <font color="red">BTN calls $30.00</font>, UTG folds
<font color="black">Turn:</font> ($102) J[img]/images/graemlins/club.gif[/img] 8[img]/images/graemlins/club.gif[/img] 6[img]/images/graemlins/spade.gif[/img] 2[img]/images/graemlins/diamond.gif[/img] (2 Players)
Hero checks, BTN checks

<font color="black">River:</font> ($102) J[img]/images/graemlins/club.gif[/img] 8[img]/images/graemlins/club.gif[/img] 6[img]/images/graemlins/spade.gif[/img] 2[img]/images/graemlins/diamond.gif[/img] 8[img]/images/graemlins/spade.gif[/img] (2 Players)
Hero checks, <font color="red">BTN bets $125.00</font>

from a 26/16/3.5 showed down a big bluff earlier when he r/r AI with a busted open ender on the river