I really suck with getting money from fish

[thac]

Guy is 41/10 over a smallish sample, and has been a typical loose/passive donk. I haven't seen anything too out of line but I haven't played with him for very long.

These river spots are gay, because it's 4 to a straight, but I'm not sure if he calls a shove, or if he is just really weak. So what's our line?

Full Tilt Poker, $1/$2 NL Hold'em Cash Game, 6 Players
LeggoPoker Hand History Converter

BB: $288.25
UTG: $446.50
MP: $128
CO: $40
Hero (BTN): $247.25
SB: $56.80

CO posts $2
Pre-Flop: 2[img]/images/graemlins/diamond.gif[/img] 6[img]/images/graemlins/diamond.gif[/img] dealt to Hero (BTN)
UTG calls $2, MP calls $2, CO checks, Hero calls $2, SB calls $1, BB checks

Flop: ($12) 8[img]/images/graemlins/diamond.gif[/img] 9[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/diamond.gif[/img] (6 Players)
SB checks, BB checks, UTG checks, MP checks, CO checks, <font color="red">Hero bets $8</font>, SB folds, UTG calls $8, 2 folds

Turn: ($28) J[img]/images/graemlins/diamond.gif[/img] (2 Players)
UTG checks, <font color="red">Hero bets $18</font>, UTG calls $18

River: ($64) Q[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">UTG bets $64</font>, Hero calls?